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    Microsoft Enforces Dedicated Exchange Hybrid App: Sept 2025 Window

    Microsoft is taking the first concrete step in its phased enforcement of the dedicated Exchange hybrid app requirement: on September 16, 2025 at 07:00 UTC Microsoft will temporarily block Exchange Web Services (EWS) traffic that uses the Exchange Online shared service principal for hybrid...
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    • april 2025 hotfix cisa guidance credential hygiene cve-2025-53786 dedicated hybrid app entra id ews ews deprecation exchange hybrid exchange online graph api graph migration health checker hybrid configuration wizard incident response m365 security on-premises patch management security service principal
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    • Forum: Windows News
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    September 2025 Exchange Hotfix Update: Preserves Dedicated Hybrid App Support

    Microsoft’s Exchange team published a short but important Hotfix Update (HU) rollup for September 2025 that is aimed at fixing a non‑security issue in earlier updates and, crucially, preserves support for the dedicated Exchange hybrid application workflow introduced earlier in 2025 — the update...
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    • cisa guidance cu14 cu15 cve-2025-53786 dedicated hybrid app entra id ews exchange hybrid exchange server exchange server 2016 cu23 graph permissions health checker hotfix update hybrid configuration wizard migration to dedicated hybrid app se rtm september 2025 service principal windows update
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    • Forum: Windows News
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    Dedicated Exchange Hybrid App in Entra ID: Timeline, Steps, and Security

    Microsoft has begun a strict, time‑boxed push to move Exchange hybrid customers off a Microsoft‑managed shared service principal and onto a dedicated Exchange hybrid app in Entra ID — a change driven by a high‑severity hybrid vulnerability and enforced through short, scheduled EWS traffic blocks...
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    • Forum: Windows News
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    Cloud-Managed Remote Mailboxes: A Step Toward Retiring the Last Exchange Server

    Microsoft’s Exchange team has taken a decisive step toward finally letting organizations retire the last Exchange server in hybrid environments by adding cloud-managed remote mailbox support — a per-mailbox “flip-the-switch” that transfers Exchange attribute authority to Exchange Online while...
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    • active-directory admin consent audit-logging auditing and compliance certificate management cisa ed 25-02 cloud managed remote mailboxes cloud migration cloud writeback cloud-managed-remote-mailboxes configureexchangehybridapplication.ps1 cve-2025-53786 dedicated hybrid app directory synced entra cloud sync entra connect sync entra id entra-cloud-sync ews block exchange hybrid exchange on-prem exchange online exchange-online freebusy hybrid configuration wizard hybrid deployment hybrid-deployment identity management isexchangecloudmanaged last exchange server last-exchange-server mailbox attributes mailbox-attributes mailtips microsoft learn oauth connectivity on-prem ad patch management phase 1 preview phase 2 writeback phase-1 phase-2 powershell profile pictures proxyaddresses rbac rich coexistence security hardening settingoverride writeback
    • Replies: 2
    • Forum: Windows News
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