Microsoft Entra ID
SecurityUpgrade Previous Version
In brief
The documentation now requires version 2.5.79.0 or later and application-based authentication by April 7, 2027. Synchronization services will stop afterward if these requirements are unmet.
What Entra admins need to know
Upgrade and configure application-based authentication before the deadline to prevent synchronization outages.
This editorial summary was generated by AI from the documentation changes. Verify important details in the full Microsoft Learn article.
Documentation change
View on Microsoft LearnThe comparison below shows only the changed extract. Use the full-page view for complete context.
It's important that you keep your servers current with the latest releases of Microsoft Entra Connect. We are constantly making upgrades to Microsoft Entra Connect, and these upgrades include fixes to security issues and bugs, as well as serviceability, performance, and scalability improvements.
To see what the latest version is, and to learn what changes have been made between versions, please refer to the release version history
@@ -17,9 +17,9 @@ This topic describes the different methods that you can use to upgrade your Micr It's important that you keep your servers current with the latest releases of Microsoft Entra Connect. We are constantly making upgrades to Microsoft Entra Connect, and these upgrades include fixes to security issues and bugs, as well as serviceability, performance, and scalability improvements. >[!IMPORTANT]->**Mandatory Upgrade Required**: All synchronization services in Microsoft Entra Connect Sync will stop working on **September 30, 2026** if you're not on at least version 2.5.79.0. In May 2025, we released this version with a back-end service change that hardens our services. Upgrade before this deadline to avoid any service disruption.+>Mandatory upgrade required: Upgrade Microsoft Entra Connect Sync to version 2.5.79.0 or later and configure application-based authentication by April 7, 2027. Legacy authentication is being retired, and synchronization services will stop working after this date if these requirements aren't met. >->If you're unable to upgrade before the deadline, all synchronization services will fail until you upgrade to the latest version. The Microsoft Entra Connect Sync .msi installation file is exclusively available on [Microsoft Entra Admin Center](https://entra.microsoft.com/#view/Microsoft_AAD_Connect_Provisioning/AADConnectMenuBlade/%7E/GetStarted). Make sure you meet the minimum requirements including .NET Framework 4.7.2 and TLS 1.2.+>If synchronization stops, upgrade to the latest version and configure application-based authentication to restore service. The Microsoft Entra Connect Sync .msi installation file is exclusively available on [Microsoft Entra Admin Center](https://entra.microsoft.com/#view/Microsoft_AAD_Connect_Provisioning/AADConnectMenuBlade/%7E/GetStarted). Make sure you meet the minimum requirements including .NET Framework 4.7.2 and TLS 1.2. To see what the latest version is, and to learn what changes have been made between versions, please refer to the [release version history](./reference-connect-version-history.md)