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Microsoft has confirmed that OneNote for Windows 10 will reach end of support on October 14, 2025, and Microsoft is urging users and organizations to migrate to the newer OneNote on Windows app now to avoid losing editing and sync functionality when the legacy app becomes read-only. (techcommunity.microsoft.com, support.microsoft.com)

A desktop monitor displays a design app with a 'Read-Only' page and device mockups.Background​

OneNote has long existed in several forms on Windows: the legacy OneNote for Windows 10 (the UWP app published for Windows 10), the newer OneNote on Windows (the modernized app distributed with Microsoft 365 and the Microsoft Store), OneNote for the web, and mobile clients. Microsoft is consolidating investment and development behind OneNote on Windows, and the company has formally announced a timeline to retire the Windows 10 UWP build as Windows 10 itself approaches end of support. This move is being framed as a consolidation to provide a single, faster, more secure OneNote experience across devices. (techcommunity.microsoft.com, support.microsoft.com)
Microsoft’s official guidance makes three concrete points clear: (1) OneNote for Windows 10 will become read-only after October 14, 2025, (2) users should sync any unsynced notes now, and (3) IT administrators should follow the published migration guidance and scripts for enterprise-scale transitions. The company has also communicated staged behavior changes that begin well before the EoS date to encourage migration. (techcommunity.microsoft.com, learn.microsoft.com)

What Microsoft is doing and why it matters​

The official timeline and immediate effects​

  • October 14, 2025 — OneNote for Windows 10 reaches End of Support; the app will be left in a read-only state and will no longer receive feature, quality, or security updates. Microsoft explicitly warns that editing, saving, and sync to the cloud from the legacy app will be disabled after this date. (techcommunity.microsoft.com)
  • June 2025 — Microsoft completed a sync infrastructure upgrade; as a result, older OneNote clients (including OneNote for Windows 10) may see slower sync performance or short-lived sync interruptions unless updated or migrated. This is a precursor event that affects multi-device collaboration and real-time updates. (mc.merill.net)
  • July 2025 — Microsoft will display in-app banners and migration prompts inside OneNote for Windows 10 to guide users to the OneNote on Windows app and the Microsoft Store listing. Administrators were notified earlier through Message Center posts. (mc.merill.net, borncity.com)
These steps are not merely cosmetic: they shrink the operational usefulness of the legacy app before the final cutoff and are intended to steer users toward the supported client. Independent reporting and the Microsoft Message Center posts corroborate the schedule and user-impact details. (windowslatest.com, howtogeek.com)

Why Microsoft says it’s happening​

Microsoft frames the consolidation as necessary to deliver faster iteration, improved security features (including Microsoft Information Protection sensitivity labeling), modern sync and performance improvements, and a single codebase that can be extended with AI-powered capabilities such as Copilot-generated notes in the future. While the OneNote on Windows client is being actively improved, the legacy UWP app does not support new enterprise-grade capabilities and lacks the extensibility needed for Copilot-style features. (techcommunity.microsoft.com, support.microsoft.com)

What this means for consumers and hobbyists​

Short-term user impact​

If you use OneNote for Windows 10 on a personal PC, the immediate practical effects are:
  • Sync your notebooks now — unsynced local sections will not automatically appear in the new app after the legacy client becomes read-only. Microsoft stresses checking sync status on every notebook before migrating. (techcommunity.microsoft.com, support.microsoft.com)
  • Expect intermittent sync slowdowns and in-app banners during summer 2025. These may disrupt workflows that rely on near-instant updates across multiple devices. Independent reporting observed that sync behavior could present notebooks as read-only temporarily until users refresh or update. (mc.merill.net, howtogeek.com)
  • After October 14, 2025 the app will still launch for viewing, but editing, saving, and cloud sync from OneNote for Windows 10 will be disabled. Users who continue to run Windows 10 past that date should either migrate to the modern OneNote client, use OneNote for the web, or consider the Extended Security Updates (ESU) path for Windows 10 itself (which is separate from OneNote support). (techcommunity.microsoft.com, support.microsoft.com)

Recommended steps for consumers (quick checklist)​

  • Open OneNote for Windows 10 and right-click each notebook > Sync This Notebook to force a full sync to OneDrive or SharePoint. Ensure the status is fully synced.
  • Look for the in-app migration banner and follow the prompt to the Microsoft Store if it’s visible; otherwise, search the Microsoft Store for OneNote on Windows and install it manually.
  • Open the new OneNote on Windows, sign in with your Microsoft account, and verify that all notebooks appear and are editable.
  • If anything is missing, check OneNote on Windows > File > Open Backups, and restore files or use local backup folders created by the legacy app. (techcommunity.microsoft.com, support.microsoft.com)

What administrators and IT pros must plan for​

Enterprise-grade risks​

Large organizations and education institutions face several non-trivial migration risks:
  • Unsynced local content: Users with offline or unsynced sections risk permanent data loss if the old app is uninstalled or becomes unusable without proper backups. Microsoft’s migration guidance requires backing up unsynced sections before uninstalling the legacy app. (learn.microsoft.com)
  • Mass deployment and per-user uninstall complexity: OneNote for Windows 10 is a UWP app packaged per user. Migration scripts and uninstall operations must be run carefully and per-user to avoid data loss or orphaned app states. Microsoft’s guide warns that uninstalling without a successful backup can lead to lost data. (learn.microsoft.com)
  • Process and timing: The staged throttling of sync performance and in-app prompts means admins should schedule migration waves well before summer 2025 to avoid user disruption. Message Center notifications provide timing, but the risk to collaboration-heavy classrooms or teams is real if migration is left until the last minute. (mc.merill.net)

Administrator migration checklist (recommended)​

  • Inventory devices and users running OneNote for Windows 10 via Intune or other asset management tools (Microsoft recommends searching for the AppId "Office.OneNote" in Intune Discovered Apps). (learn.microsoft.com)
  • Force a sync across targeted devices and collect logs showing sync success (look for UWP sync status files such as UWPBackUpStatus.json and UWPSyncStatus.json). (learn.microsoft.com)
  • Back up any unsynced content using the onenote-uwp://backup: protocol and move backups out of the app sandbox to safe locations. Microsoft provides explicit sandbox paths in the migration guide. (learn.microsoft.com)
  • Deploy OneNote on Windows across devices via WinGet, Microsoft Store for Business, or Microsoft 365 deployment tools. Microsoft documents a WinGet command (WinGet download 9wzdncrfhvjl --skip-license) for automated installations. (learn.microsoft.com)
  • Uninstall OneNote for Windows 10 per-user only after validated backups are confirmed; test the script on a small pilot group before broad rollout. (learn.microsoft.com)

Technical migration details IT teams need to know​

Backup paths and recovery​

Microsoft’s migration guidance provides exact sandbox folder locations and file names administrators should inspect, for example:
  • The UWP sandbox backup path layout (where unsynced section backups are initially stored) and recommended destination paths are described in the migration documentation; administrators must move backups out of the sandbox before uninstalling otherwise the sandbox removal will delete the content. The migration documentation explicitly warns that uninstalling with a failed backup can lead to data loss. (learn.microsoft.com)

Troubleshooting sync problems​

Message Center advisories and support references describe specific sync errors and behavior administrators may see during June 2025 infrastructure changes:
  • Notebooks may open as read-only with a “Refresh” prompt.
  • Status messages such as “Saved offline – Refresh” and sync error codes (e.g., E000006C) can appear until clients are updated or refreshed.
  • These issues were reported as part of an infrastructure upgrade completed at the end of June 2025; updating or migrating clients addresses the majority of problems. (mc.merill.net)

Automation and deployment options​

  • WinGet: Microsoft lists a WinGet package ID for the new OneNote on Windows that administrators can use to script bulk deployments. (learn.microsoft.com)
  • Intune and Group Policy: The new OneNote offers administrative controls through Group Policy and Intune, which the legacy UWP app lacks. For enterprises requiring configuration management, the modern app unlocks centralized policy, telemetry, and update control. (learn.microsoft.com)

The pros and cons of migration — what administrators and users should weigh​

Benefits of moving to OneNote on Windows​

  • Active development and security fixes: The modern app receives ongoing updates, security patches, and quality-of-life improvements. (techcommunity.microsoft.com)
  • Performance and sync improvements: Microsoft cites faster sync and better performance in the OneNote on Windows client. The recent sync infrastructure upgrade aims to make real-time collaboration more reliable for the modern client. (techcommunity.microsoft.com, mc.merill.net)
  • Enterprise features: Microsoft Information Protection (MIP) sensitivity labeling and Group Policy/Intune management are available in the new app, which matter for regulated or compliance-minded organizations. (learn.microsoft.com)
  • Future AI integration: Microsoft has teased Copilot-powered note generation and other AI features as coming to the modern OneNote experience, though exact timelines are not specified. (techcommunity.microsoft.com)

Risks and downsides​

  • Potential for data loss if not properly synced/backed up: Any local-only sections must be identified and backed up before migration. Microsoft’s step-by-step guidance exists, but it requires disciplined execution. (learn.microsoft.com)
  • User training and UI differences: The new OneNote offers a different UX and feature set compared with the legacy UWP build; touchscreen and pen users may find differences that require short retraining sessions. (support.microsoft.com)
  • Staged degradation could disrupt workflows: The planned sync slowdowns and in-app banners create friction that could impact classrooms or teams relying on immediate multi-device updates if migration isn’t scheduled carefully. This behavior—though documented in message center posts—may be perceived by users as a forced obsolescence tactic, which has reputational cost. Independent reporting has highlighted the staged nature of these changes. (mc.merill.net, windowslatest.com)

Practical migration playbooks​

Consumer playbook (simple, low-risk)​

  • Ensure every notebook shows Synced in OneNote for Windows 10. Manually force sync where needed. (techcommunity.microsoft.com)
  • Install OneNote on Windows from the Microsoft Store. Open and sign in. Verify notebooks load and are editable. (techcommunity.microsoft.com)
  • Keep the legacy app installed until you are fully satisfied. Do not uninstall until all content is verified or a backup is made. (support.microsoft.com)

Small business / education playbook​

  • Communicate schedule and expectations to users at least 60–90 days before any bulk migration. Provide a step-by-step guide for staff and students to verify sync status. (learn.microsoft.com)
  • Pilot migration with a small department or classroom: use the WinGet deployment to push OneNote on Windows and confirm function. (learn.microsoft.com)
  • Use the UWP backup protocol for any user reporting unsynced content, validate backups outside the sandbox, and only then uninstall the legacy app per-user. (learn.microsoft.com)

Large enterprise playbook (recommended)​

  • Run Intune discovered app reports to enumerate OneNote for Windows 10 installations and create migration waves based on business-critical users. (learn.microsoft.com)
  • Run scripted backups and parse UWPBackUpStatus.json and UWPSyncStatus.json to verify backup integrity. Move backups to network locations for archival. (learn.microsoft.com)
  • Deploy OneNote on Windows via WinGet or Microsoft Store for Business, and configure policies through Group Policy/Intune. Validate end-to-end functionality (sync, collaboration, sensitivity labeling) with pilot groups before broad rollout. (learn.microsoft.com)

Questions that remain and claims to treat cautiously​

  • Microsoft’s mention of Copilot-powered notes generation and other AI features is an invitation, not a commitment to precise dates or capabilities; the company has announced the plan, but there is no specific release timetable attached to Copilot features for OneNote on Windows. Treat these as roadmap promises, not shipped functionality. (techcommunity.microsoft.com)
  • Reporting that Microsoft is “intentionally slowing” the legacy app is a reasonable interpretation of Message Center advisories about sync behavior, but the technical justification Microsoft gave frames the change as an outcome of syncing infrastructure upgrades. The effect is the same (slower sync on older clients), but the phrase “intentional throttling” implies intent to force migration; administrators should focus on reliable mitigation (migration, user communication, and backups) rather than debating intent. Message Center notices and independent reporting document the sync impacts and banner rollouts; avoid hyperbolic framing in operational planning. (mc.merill.net, windowslatest.com)
  • Any third-party commentary that frames the move purely as a revenue or hardware-forcing tactic should be treated as opinion unless backed by company policy or documentation; the documented facts are the sync behavior changes, banner prompts, and a hard end-of-support date. Microsoft’s public documentation and Message Center posts are the authoritative timeline and instructions. (techcommunity.microsoft.com, mc.merill.net)

Final recommendations — an executive summary for IT leaders​

  • Treat October 14, 2025 as a hard cutoff for OneNote for Windows 10 editing and sync; plan to have all users on OneNote on Windows or an alternative client well before that date. (techcommunity.microsoft.com)
  • Run discovery and inventory now, prioritize migration for collaboration-heavy teams (education, frontline workers, shared notebooks), and schedule staged rollouts using WinGet or your management tooling. Validate backups for any device or user reporting unsynced notes. (learn.microsoft.com)
  • Communicate early and frequently to end users: explain the visible changes (banners, possible temporary sync messages), the steps they must take to preserve data, and where to get help if notes are missing. Use the migration guide and Message Center advisories to shape your internal comms. (mc.merill.net, learn.microsoft.com)
  • If your organization must continue using Windows 10 beyond October 14, 2025, evaluate the Extended Security Updates (ESU) option for Windows 10 and consider how that intersects with your OneNote strategy; ESU for Windows is separate from OneNote app support. Also note Microsoft will continue security updates for Microsoft 365 apps on Windows 10 for a limited extended period, but the OneNote for Windows 10 app itself will be read-only after the EoS date. (support.microsoft.com, techcommunity.microsoft.com)

Microsoft’s announcement is a reminder that app lifecycles often follow platform lifecycles. The consolidation to a single OneNote client simplifies Microsoft’s product footprint and unlocks new features and management capabilities for organizations, but it also imposes a concrete migration effort with real data-protection responsibilities. Executing a deliberate, well-documented migration plan—rooted in the Microsoft migration guidance and the Message Center advisories—will minimize risk and ensure notebooks remain available and editable once the legacy app enters its read-only phase on October 14, 2025. (techcommunity.microsoft.com, learn.microsoft.com, mc.merill.net)

Source: Neowin PSA: OneNote for Windows 10 is being killed off, here is what you need to do
 

A blue futuristic infographic showing OneNote for Windows 10 transitioning to OneNote on Windows.
Microsoft has confirmed that OneNote for Windows 10 will reach end of support on October 14, 2025, and the legacy app will be left in a read‑only state — users will still be able to view notebooks but will no longer be able to edit, sync, or receive updates from that client after the cutoff. (techcommunity.microsoft.com)

Background​

OneNote has existed on Windows in multiple forms for years: the original desktop OneNote (the Office/Win32 package), the UWP‑style OneNote for Windows 10 (shipped as the in‑box app and optimized for touch), the modern OneNote on Windows app distributed via the Microsoft Store and Microsoft 365 channels, plus mobile and web clients. Microsoft is consolidating investment behind the single, modern OneNote on Windows app to simplify development, improve security, and accelerate feature rollout — particularly for AI‑driven capabilities such as Copilot‑powered features. (techcommunity.microsoft.com)
The end‑of‑support decision sits within a broader timeline: Microsoft also ends support for Windows 10 itself on October 14, 2025, and is encouraging migrations to Windows 11 or to paid Extended Security Updates (ESU) where upgrade isn’t feasible. These broader lifecycle changes create synchronized planning needs for individuals, EDU environments, and enterprise IT. (support.microsoft.com, theverge.com)

What Microsoft announced — the essentials​

  • OneNote for Windows 10 will reach End of Support on October 14, 2025. After that date the app will be read‑only: viewing is allowed, but editing, saving, sync, and updates will no longer be available from the legacy UWP client. (techcommunity.microsoft.com)
  • Microsoft recommends moving to OneNote on Windows (the modern Store/365 app), which is free and already available to personal, education, and enterprise users. (support.microsoft.com)
  • Migration tooling and in‑app prompts are being rolled out to guide users (a “Switch now” / migration ribbon appears in the legacy app to point people to the Store and the new client). Microsoft documents a WinGet package and deployment guidance for enterprises. (support.microsoft.com)
  • Microsoft is tying future investment — including Copilot notebooks and other AI features — to the modern OneNote client, which supports the required extensibility and enterprise controls. (techcommunity.microsoft.com, support.microsoft.com)
These are not speculative changes: Microsoft’s product blog and support documentation spell out the date, the read‑only behavior, and the migration guidance. (techcommunity.microsoft.com, support.microsoft.com)

What this means for everyday users​

The immediate single‑sentence takeaway for individuals is simple: if you rely on OneNote for Windows 10 for capturing, editing, and syncing notes, start the migration now — waiting until mid‑October risks losing edit and sync capability on that app.

Short‑term actions every user should take now​

  1. Confirm every notebook shows Synced in OneNote for Windows 10. Unsynced or local‑only content will not automatically appear in the new app. (support.microsoft.com)
  2. Use the in‑app migration banner (or search the Microsoft Store) to install OneNote on Windows and sign in with the same Microsoft account. Notebooks stored in OneDrive or SharePoint should appear automatically. (support.microsoft.com)
  3. If any notes are missing after migration, open File > Open Backups in the new OneNote, or restore from locally saved backups you created prior to uninstalling the legacy client. (support.microsoft.com)
Microsoft’s consumer guidance is intentionally simple, but the practical details matter: unsynced local sections and sandboxed backups used by the UWP app can be invisible if administrators or users don’t explicitly export them before the read‑only mode or before uninstall. The company’s migration FAQ highlights this risk and the need for deliberate sync + backup steps. (support.microsoft.com)

Step‑by‑step migration guide (concise, practical)​

Follow this checklist to minimize risk of data loss and disruption:
  1. Open OneNote for Windows 10. Right‑click each notebook → Sync This Notebook. Confirm the notebook status is Synced. (techcommunity.microsoft.com)
  2. Search the notebook list for any Saved offline or Sync errors. Resolve sync errors; unsynced sections require manual backup. (support.microsoft.com)
  3. If local-only content exists, use the UWP backup pathway (the onenote-uwp://backup: protocol or manual sandbox copy) and move those backups out of the app sandbox to a safe folder you control. Validate the exported files.
  4. Click the Switch now migration ribbon (if shown) or install OneNote on Windows from the Microsoft Store; sign in with the same Microsoft account. (techcommunity.microsoft.com)
  5. Verify notebooks appear and are editable in the new app. If content is missing, use File > Open Backups or import the sandbox backups you exported earlier. (support.microsoft.com)
  6. Keep the legacy app installed until the new client is verified across devices; do not uninstall it until backups are validated. For enterprise rollouts, pilot with a small group first and test scripted backups.
This ordered checklist mirrors Microsoft’s public guidance and the operational checks that administrators have reported as necessary during real migrations. (support.microsoft.com)

Enterprise and education: planning and risk mitigation​

Large organizations and school districts must treat this as a project, not a single‑user click. The UWP packaging model and per‑user sandboxing used by OneNote for Windows 10 create specific enterprise challenges.

Key administrative concerns​

  • Inventory and discovery. Use Intune, SCCM, or other asset tools to find which users have the UWP app installed (Microsoft recommends checking for the AppId "Office.OneNote"). Plan wave‑based rollouts.
  • Unsynced local data. Automate a forced sync and gather logs (UWPBackUpStatus.json, UWPSyncStatus.json) to verify success before migration. Any local‑only content must be surfaced and exported to network storage prior to uninstallation.
  • Deployment tooling. Use WinGet, Microsoft Store for Business, or Microsoft 365 deployment channels to distribute the modern OneNote app. Microsoft publicly documents a WinGet command for scripted installs.
  • Per‑user uninstall. Uninstalling the legacy UWP app without confirmed backups can permanently erase sandboxed data. Microsoft’s migration guidance explicitly warns against unvalidated mass uninstalls. (support.microsoft.com)

Recommended enterprise migration timeline​

  • Now–September: Discovery, pilot migrations, and communications to user groups. Verify export scripts and backup integrity in a pilot.
  • September–early October: Staged rollouts; escalate support staffing for sync errors and missing notebook reports.
  • By October 14, 2025: Ensure all mission‑critical users are on OneNote on Windows or have archived backups; leave the legacy app installed for viewing if necessary. (support.microsoft.com)
These operational steps reflect both Microsoft’s published guidance and independent reporting from IT‑focused outlets that have tracked Message Center advisories and migration experiences. (support.microsoft.com)

Security, features, and the AI argument​

Microsoft frames consolidation as an efficiency and security play: maintaining one actively developed client simplifies patching, enables enterprise features (sensitivity labels via Microsoft Information Protection), and unlocks AI integrations that the legacy UWP architecture cannot easily support. The company explicitly lists Copilot‑powered notebooks and other intelligent features as part of the OneNote roadmap. (techcommunity.microsoft.com, support.microsoft.com)
From a security and product‑management standpoint, consolidation carries clear advantages:
  • Single update channel reduces fragmentation and the surface area for unsupported client bugs. (support.microsoft.com)
  • Enterprise controls (Group Policy and Intune management) are available in the modern client, simplifying compliance and telemetry.
  • AI extensibility — Copilot Notebooks integrate context from OneNote, files, and chats to provide grounded AI responses, summaries, and audio overviews — is already shipping into the modern client. (techcommunity.microsoft.com, support.microsoft.com)
These are real benefits, but they come with tradeoffs: the move accelerates reliance on cloud storage and Microsoft 365 services, and it privileges users and organizations already committed to Microsoft’s ecosystem.

Risks, unresolved questions, and caveats​

No migration of this scale is risk‑free. The following are the most important risks and the evidence that supports concern.
  • Data loss from unsynced/sandboxed content. Microsoft’s own docs and migration guides warn that unsynced local sections will not migrate automatically. Several enterprise analyses and community threads stress that improper uninstallation can delete sandboxed backups. This is a verifiable operational risk that requires explicit remediation steps. (support.microsoft.com)
  • Staged degradation before cutoff. Administrators reported that sync infrastructure upgrades in mid‑2025 caused temporary read‑only behavior and slower sync responses in older OneNote clients; this has been observed and communicated in Message Center advisories. That staged throttling is documented and increases the urgency to migrate early rather than waiting until October.
  • Accessibility and workflow gaps. Certain legacy behaviors — especially specific pen/touch workflows and integrations with Immersive Reader or Microsoft Lens export flows — may differ in the modern client or Copilot flows. Organizations that rely on those exact workflows should validate parity before mass migration. Microsoft recommends testing accessibility features as part of pilot deployments.
  • Reputational and strategic concerns. Critics argue Microsoft’s platform lifecycle and hardware push (Windows 10 EOS coinciding with one‑app consolidation) create incentives that nudge users toward Windows 11 and Copilot‑centric devices. These are policy and business criticisms supported by lawsuits and news commentary; they should be treated separately from the technical migration facts. Reported complaints and a recent lawsuit have been covered by independent outlets and reflect user and advocacy skepticism. These complaints are real but are opinions and legal claims rather than technical facts about the migration process; treat them as context, not as migration guidance. (windowscentral.com, theverge.com)
  • Unclear timelines for some AI features. Microsoft lists Copilot features and Copilot Notebooks as forthcoming or rolling out in the modern app, but specific release dates for every promised AI capability are not guaranteed. Where Microsoft uses roadmap language rather than firm commits, treat those promises as planned direction rather than shipped functionality. (techcommunity.microsoft.com)
Where facts are uncertain — for example, exact release dates for new Copilot capabilities or the long‑term feature parity for niche pen workflows — the official Microsoft pages are the authoritative source and should be monitored for updates. (techcommunity.microsoft.com, support.microsoft.com)

Strengths of Microsoft’s approach (balanced view)​

  • Consolidation reduces fragmentation. Fewer clients means fewer update paths to test and more concentrated engineering resources for security, performance, and new features. This is a sound product‑management rationale. (techcommunity.microsoft.com)
  • Better enterprise controls. The modern OneNote exposes administrative policy and telemetry unavailable in the legacy UWP variant, which is important for regulated organizations.
  • AI features that require a modern platform. Copilot Notebooks rely on integration points and cloud‑first context that the legacy app cannot support; hosting these features in a unified client enables new productivity scenarios. (techcommunity.microsoft.com, support.microsoft.com)
These strengths have practical upside for organizations that test and plan migrations carefully: faster feature delivery, better security patching, and new AI‑driven productivity tools.

Practical checklist and timelines for readers​

  • Immediate (this week): Force a full sync for every notebook; screenshot sync status. Export any local backups. (support.microsoft.com)
  • Short‑term (next 2–4 weeks): Install OneNote on Windows on one device and validate all notebooks are editable. Conduct a small pilot group. (support.microsoft.com)
  • Mid‑term (by end of September 2025): Complete staged enterprise deployments; resolve outstanding sync errors; finalize user communications and training materials.
  • Critical date: October 14, 2025 — legacy app enters read‑only mode. Ensure all critical users are migrated and backups are archived. (techcommunity.microsoft.com)
For admins: script discovery, test the WinGet deployment, and validate backup exports from the UWP sandbox before running any mass uninstalls.

Final assessment — what Windows users and admins should take away​

The retirement of OneNote for Windows 10 is a textbook example of product rationalization: Microsoft is consolidating clients to concentrate engineering effort, enable modern security and management controls, and unlock AI capabilities that the legacy architecture cannot support. Technically, the change is sensible; operationally, it is non‑trivial.
Two linked realities make this more than a simple app swap: (1) Windows 10’s own end‑of‑support on October 14, 2025 tightens timelines for many organizations, and (2) the legacy UWP OneNote’s sandbox and local backup model mean that careless migration or uninstallation can lead to unrecoverable data loss. These combined factors make immediate, proactive migration planning essential. (support.microsoft.com)
The migration offers concrete advantages — better security posture, enterprise controls, and AI features — but it also amplifies cloud dependence and raises governance, accessibility, and upgrade‑cost questions that organizations must address openly. Where Microsoft’s public roadmap promises new Copilot features, those are valuable; where dates are vague, treat them as forthcoming, not guaranteed. (techcommunity.microsoft.com)
For readers still using OneNote for Windows 10: back up, sync, test the modern client, and migrate early. For IT leaders: inventory, pilot, communicate, and validate backups before you touch the uninstall button. Treat October 14, 2025 as a firm planning anchor — it will be the moment the legacy client loses editing and sync capability. (techcommunity.microsoft.com)

Microsoft’s consolidation of OneNote is a major product milestone with real benefits and real execution risk. The technical path forward is clear; the work required to take it without losing data or disrupting users is the management challenge every Windows‑centric organization must now plan for.

Source: Windows Report Microsoft to End Support for Windows 10 OneNote in October
 

Microsoft is retiring the OneNote for Windows 10 app and is asking users and organizations to migrate to the newer OneNote on Windows app, with the classic UWP-style OneNote becoming read-only on October 14, 2025 — the same date Microsoft ends mainstream support for Windows 10. This move consolidates Microsoft’s note‑taking strategy around a single, actively developed OneNote application available through the Microsoft Store and Microsoft 365, but it also creates a hard deadline and a migration project for millions of personal and enterprise users who still rely on the older app.

Two tablets stand on a desk as a cloud and colorful icons float between them.Background​

OneNote has long been a fractured product family on Windows. For years Microsoft shipped two different OneNote experiences: the legacy desktop/Win32 OneNote (and OneNote 2016), and the OneNote for Windows 10 Universal Windows Platform (UWP) app that was preinstalled on many Windows 10 devices. Over the past few years Microsoft has been consolidating those variants into a single modern OneNote app — marketed as OneNote on Windows — which is distributed via the Microsoft Store and included with Microsoft 365.
In August 2025 Microsoft announced that OneNote for Windows 10 will reach end of support on October 14, 2025. From that date forward the older app will be placed in read‑only mode: users can view existing notes but will no longer be able to create, edit, or synchronize new changes from that client. Microsoft’s messaging is explicit: users should migrate notebooks to the new OneNote on Windows app to continue editing and syncing notes and to receive ongoing updates, fixes, and new features.
This retirement aligns with Windows 10’s broader lifecycle: Microsoft ends support for Windows 10 Home and Pro on October 14, 2025. The OneNote decision is therefore part product consolidation and part lifecycle alignment.

Overview: What’s changing and why it matters​

  • What’s being retired: OneNote for Windows 10 (the UWP app preinstalled on many Windows 10 machines) will reach end of support and be set to read‑only on October 14, 2025.
  • What replaces it: The modern OneNote on Windows app — available in the Microsoft Store and bundled with Microsoft 365 — becomes the primary, actively supported Windows OneNote experience.
  • Immediate effect for users: Existing OneNote for Windows 10 installations will continue to work until the end-of-support date, but you must ensure notebooks are synced to the cloud and migrated before October 14, 2025 to avoid losing editing capability.
  • Why Microsoft is doing it: Consolidation reduces duplicate development effort, enables faster feature delivery (including AI/Copilot features in future roadmaps), and simplifies product support and security lifecycles.

How to tell which OneNote you have installed​

Microsoft has made identifying your OneNote version straightforward:
  • Open OneNote. If you see a File menu at the top of the window, you are running the new OneNote on Windows app.
  • If there is no File menu and the title bar or About text shows “OneNote for Windows 10,” you are running the older UWP client that will be affected by the October 14, 2025 change.
This simple visual check is the fastest way to know whether you need to act.

What Microsoft recommends: sync first, then migrate​

Microsoft is clear about the migration order: sync everything first in the classic app, then install and sign into the new OneNote on Windows.
Key migration steps simplified:
  • In OneNote for Windows 10, right‑click each notebook and choose Sync Now (or Sync This Notebook). Confirm sync completes without errors.
  • Resolve any sync errors you encounter. Notebooks that haven’t synced won’t appear in the new app.
  • Look under the View tab or navigation pane for Misplaced Sections (sections that didn’t attach to a notebook). Move any misplaced sections into the correct notebook and sync again.
  • Open the OneNote on Windows app (download it from the Microsoft Store if needed), sign in with the same Microsoft account(s), and verify your notebooks and pages are present.
  • Only after confirming that all notebooks and content are visible and intact in the new app should you consider uninstalling the old OneNote for Windows 10 client.
These steps are low‑tech but essential. The migration is fundamentally a cloud sync problem: if your notebook content hasn’t reached OneDrive or SharePoint, it won’t be available in the new app.

Practical migration checklist for home users​

  • Back up your current notebooks by ensuring every notebook shows a recent successful sync timestamp.
  • For each notebook:
  • Right‑click → Sync Now
  • Open OneNote on the web (OneNote Online) to confirm pages appear in the cloud.
  • Check accounts: if you use multiple Microsoft accounts (personal, work, school), repeat the sync process for each account separately.
  • Look for “Misplaced Sections” and move them to the appropriate notebook.
  • Install OneNote on Windows, sign in, and confirm notebooks are present.
  • Keep the old app until you’ve validated content and functionality in the new app.

Migration considerations and gotchas​

  • Multiple accounts are painful: OneNote requires you to sync each account and notebook manually. If you have several Microsoft accounts or use notebooks across personal OneDrive and organizational SharePoint, migration can be time‑consuming.
  • Sync errors block migration: Any notebook that reports a sync error in the old client will not appear correctly in the new client until the error is resolved. Common causes include insufficient OneDrive quota, permission problems on SharePoint, or transient service issues.
  • Misplaced sections: OneNote sometimes puts unsynced content into a “Misplaced Sections” area. These sections must be moved into a notebook and re‑synced to migrate properly.
  • Local‑only notebooks: The older desktop/Win32 OneNote historically supported fully local notebooks (.one files) in places like Documents\OneNote Notebooks. Many modern flows assume cloud storage. If you have local notebooks that were never moved to OneDrive/SharePoint, they won’t be accessible in the new app until converted and uploaded.
  • Feature differences: The two apps are now consolidated, but the UI and certain behaviors differ. Power users who depended on tiny quirks of the old UWP app or on OneNote 2016-specific features should test the new app before fully switching.
  • Enterprise policies: Large organizations should use the migration guidance and scripts Microsoft published (Intune/Group Policy support exists) and run pilot deployments before wide rollout.

Enterprise and education: scale, scripting, and Intune​

Enterprises should treat this like any other product retirement: plan, pilot, and monitor.
  • Use Microsoft’s migration guidance to identify machines and users still using OneNote for Windows 10 (Intune and inventory techniques work).
  • Run pilot migrations with a subset of users to identify common sync failures and permission issues.
  • Automate the install of OneNote on Windows via deployment tools and configure Group Policy or MDM settings where available.
  • Provide step‑by‑step internal documentation and support channels for end users, because manual sync and account reconciliation will be the primary friction points.
  • Expect helpdesk demand: many users won’t know whether they have synced locally saved pages, or which account their notes live under.
Doing migrations without pilot testing invites confused users and support tickets; doing it with a staged rollout and clear communications reduces risk.

Benefits of consolidation — what Microsoft gains and what users might like​

  • Single codebase: A unified OneNote app simplifies updates, security fixes, and feature rollout. That means users can receive new capabilities (and bug fixes) more quickly.
  • Modern features: The newer OneNote is being positioned to receive richer features, including AI‑powered enhancements (note generation, summarization, contextual search) that Microsoft plans to prioritize on the consolidated app.
  • Easier procurement and support: For IT teams, having one supported app simplifies packaging and lifecycle management.
  • Better parity across platforms: Consolidation aims to narrow functional differences between Windows, macOS, mobile, and web clients.
For many users this will feel like a long‑overdue cleaning up of product fragmentation.

Risks and downsides — why this isn’t painless​

  • Data‑loss risk from incomplete syncs: The single biggest risk is unsynced or local content that never reaches OneDrive or SharePoint. If users assume everything is in the cloud and stop editing before migrating, they risk edits being locked into an unreadable local cache.
  • User confusion: Users who have not closely followed OneNote’s evolution may not realize which client they run or what “read‑only” means until it happens.
  • Feature regressions: Historically, Microsoft’s app consolidations sometimes removed quirky but useful features (for example, touch‑first behaviors or specific integrations). Power users who rely on those features must test carefully.
  • Admin overhead for organizations: Large deployments with shared notebooks, Class Notebooks (education), or SharePoint‑hosted books must plan carefully to preserve permissions and sharing links.
  • Support window alignment with Windows 10: Tying the OneNote retirement date to Windows 10’s end of support compresses timelines — many organizations are already juggling Windows OS upgrades and may find adding a OneNote migration stressful.
These are real operational and human risks, not theoretical problems. Treat the migration as a data protection project first, UI change second.

Step‑by‑step migration guide (practical, condensed)​

  • Inventory:
  • List which users/devices run OneNote for Windows 10.
  • Identify notebooks that are shared, stored in SharePoint, or in personal OneDrive.
  • Backup:
  • Ensure each notebook shows a successful recent sync in the old app.
  • Export or copy critical local notebooks if they aren’t stored in the cloud.
  • Resolve Sync Issues:
  • Check OneDrive storage quotas.
  • Confirm SharePoint permissions.
  • Repair credential issues (Credential Manager) if authentication problems appear.
  • Move “Misplaced Sections” back into notebooks.
  • Install:
  • Deploy OneNote on Windows via Microsoft Store or enterprise deployment methods.
  • Validate:
  • Sign into the new app with each account and verify notebook integrity and page history.
  • Confirm shared notebook permissions and links still work.
  • Communicate:
  • Tell users when the old app will become read‑only and provide simple migration steps and support contacts.
  • Decommission:
  • After verification, remove the old app from new device images and consider uninstalling on managed machines only after a safe retention period.

Troubleshooting common problems​

  • If a notebook doesn’t appear in the new app: re-open OneNote for Windows 10 and force Sync Now for that notebook; then check OneNote Online to confirm cloud presence.
  • If you find “Misplaced Sections”: open Misplaced Sections, right‑click the tab, choose Move or Copy, choose the correct notebook, then sync.
  • If you see sync error codes: search for the specific code in Microsoft’s support database or use OneNote Online as a temporary editing surface (edits there will sync to cloud copies).
  • If a notebook was stored only locally: locate the .one notebook folder (commonly under Documents\OneNote Notebooks), and use the desktop OneNote or export/import workflows to move it into OneDrive.

The bigger picture: What this says about Microsoft’s app strategy​

Microsoft’s consolidation is part of a broader trend: rationalize overlapping clients, centralize investment, and prepare for AI‑driven features that require a modern, unified codebase. The company’s stated roadmap for OneNote includes intelligent features and closer integration with Microsoft 365 services, which are easier to deliver when engineering toil isn’t split across several divergent apps.
However, consolidation exposes tensions between innovation and backward compatibility. Previous app transitions (mail clients, Windows inbox apps) have shown that even well‑intentioned consolidations can cause user frustration if functionality or workflows change. Microsoft’s playbook this time emphasizes migration tools and admin guidance, but the human element — users who keep notes in unexpected places or who use dated workflows — remains the largest unknown.

Recommendations: What every user should do this week​

  • Open OneNote for Windows 10 now and check whether you see a File menu (identifies the newer app) or not.
  • Immediately run manual syncs on every notebook and confirm their presence at OneNote Online or OneDrive.
  • If you rely on local-only notebooks, copy or export them to cloud storage before October 14, 2025.
  • If you are an admin, start inventorying and piloting now — do not wait until the last quarter of 2025.
  • Educators and students who use Class Notebooks should validate that their class notebooks function correctly after migration and update any classroom documentation that references the old client.

Final analysis: overdue cleanup — but execution matters​

Consolidating OneNote makes sense: a single, actively developed OneNote app reduces fragmentation and enables Microsoft to deliver features faster and more consistently across platforms. For power users and IT teams this should — in theory — simplify management.
That said, the success of this consolidation hinges on the migration experience. Microsoft’s guidance is sound: sync first, migrate second. The reality of millions of notebooks, multiple accounts, local notebooks, shared notebooks on SharePoint, and human error makes this a messy process in practice. Microsoft has published migration guidance and tooling for administrators, but the technical details of resolving sync errors and reconciling misplaced sections will generate real helpdesk work for many organizations.
The risk is not the product decision itself but the downstream operational friction and data exposure from unsynced notes. For individual users the fix is simple: take a few minutes to confirm sync status and switch to the new app. For enterprises and large education deployments, the effort will be nontrivial but manageable with pilot testing and clear communications.
In short: this consolidation is likely the right long‑term move for OneNote, but the short term will demand attention. Users who treat the October 14, 2025 deadline as a hard migration milestone and follow the sync → validate → migrate pattern will avoid most pitfalls. Those who assume “everything is already in the cloud” may face unpleasant surprises when the old app goes read‑only.

Microsoft’s OneNote transition is not merely a product update; it is a reminder that application lifecycles and OS support timelines intersect, and that data stewardship — verifying where content lives and how it is backed up — remains a core personal and organizational responsibility. The clock is set: sync now, migrate deliberately, and validate thoroughly.

Source: gHacks Technology News Microsoft discontinues OneNote for Windows 10, asks users to migrate to OneNote on Windows - gHacks Tech News
 

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