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on-premises exchange

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On-premises Exchange content on WindowsForum.com covers the administration, security, and lifecycle of Microsoft Exchange Server deployed in local data centers. Key topics include the transition to Exchange Server Subscription Edition (SE), which shifts on-premises email to a subscription model aligned with cloud practices. Administrators will find guidance on patching vulnerabilities like CVE-2025-33051, applying hotfix updates for Exchange 2016 and 2019, and planning for the retirement of Office Online Server by 2026. The deprecation of Basic Authentication for SMTP AUTH is also discussed, emphasizing migration to secure methods. These discussions help IT professionals maintain secure, compliant on-premises Exchange environments while navigating Microsoft's evolving roadmap.
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    Microsoft retires Office Online Server by 2026: Plan migration to 365 Copilot

    Microsoft’s decision to retire Office Online Server (OOS) by December 31, 2026 redraws the map for on‑premises browser‑based Office experiences and crystallizes a broader strategy: funnel engineering toward Microsoft 365 and cloud‑native Copilot capabilities while testing how far those AI...
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    • copilot microsoft 365 office online server on-premises exchange
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    • Forum: Windows News
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    CVE-2025-33051: Exchange Server Information Disclosure Patch Guide

    A Microsoft Security Update Guide entry for CVE-2025-33051 describes an information disclosure vulnerability affecting Microsoft Exchange Server, and the appearance of that CVE on the vendor’s advisory should put any on‑premises Exchange administrator on high alert. At the time of writing...
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    • azure ad credential rotation cve-2025-33051 eol systems exchange hybrid exchange server hybrid apps incident response information disclosure keycredentials mfa msrc on-premises exchange patch security updates service principal threat intelligence threat mitigation
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    • Forum: Security Alerts
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    Exchange Server Subscription Edition (SE): The Future of On-Premises Enterprise Email

    The release of Exchange Server Subscription Edition (SE) marks a pivotal moment for Microsoft’s enterprise email infrastructure, moving decisively into a new era characterized by a subscription-centric, cloud-aligned approach even for on-premises scenarios. Enterprises that have depended on...
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    • cloud integration data sovereignty email infrastructure email security enterprise collaboration enterprise email exchange se exchange server hybrid cloud in-place upgrade it budgeting it strategy microsoft 365 microsoft roadmap migration on-premises exchange regulatory compliance subscription model support lifecycle
    • Replies: 0
    • Forum: Windows News
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    Microsoft Extends SMTP AUTH Basic Auth Deprecation to April 2026: What You Need to Know

    Microsoft has announced a significant update regarding the deprecation of Basic Authentication (Basic Auth) for Exchange Online's Client Submission (SMTP AUTH). Originally slated for permanent removal in September 2025, the timeline has been extended to begin on March 1, 2026, with complete...
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    • authentication azure communication services cloud security cybersecurity deprecation timeline email infrastructure email protocol email security exchange online it compliance microsoft microsoft 365 oauth on-premises exchange security best practices security transition security updates smtp auth
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    • Forum: Windows News
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    Microsoft's April 2025 Hotfix for Exchange Server 2016 & 2019: Essential Updates & Future Risks

    Microsoft just dropped its April 2025 Hotfix Updates for Exchange Server 2019 and 2016, and let’s be honest: if you’re an IT pro managing one of these beasts, you probably just felt a chill run down your spine. Yes, once again, Microsoft’s keeping us all on our toes—and by “on our toes,” I mean...
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    • azure rights management cloud migration email security entra id exchange 2016 exchange 2019 exchange end of support exchange hybrid exchange infrastructure exchange scripts exchange server exchange server hotfix graph api it professional tips june 2025 update microsoft support on-premises exchange patch management security updates
    • Replies: 0
    • Forum: Windows News
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