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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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    Migrate to the Dedicated Exchange Hybrid App: Urgent Guide

    Microsoft’s Exchange team has given hybrid administrators a clear-but-urgent migration mandate: switch to the dedicated Exchange hybrid app and update on‑prem servers now, or face temporary disruptions in September and October followed by a permanent enforcement that will stop rich coexistence...
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    • admin consent april 2025 hotfix azure ad cisa ed-25-02 cisa guidance cve-2025-53786 dedicated hybrid app entra id ews ews block exchange hybrid graph api hcw hybrid coexistence hybrid deployment hybrid migration it governance keycredentials microsoft learn oauth office 365 on-prem to online phased enforcement security security auditing security hardening service principal setting override
    • Replies: 1
    • Forum: Windows News
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    August 2025: Dedicated Hybrid App for Skype for Business Hybrid - Act by Oct 15

    Microsoft’s August 2025 hotfixes for Skype for Business Server introduce a security-first change that will force organizations with hybrid deployments to act quickly: a new, customer-managed Dedicated Hybrid Application model replaces the long-standing Microsoft-managed shared service principal...
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    • app registration auditability aug 2025 hotfix dedicated hybrid application entra id esu ews exchange online hybrid configuration hybrid enforcement hybrid security microsoft entra id october 15 2025 on-prem to cloud hybrid security hardening skype for business skype meetings application
    • Replies: 0
    • Forum: Windows News
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