Quick note for administrators who have Azure AD Connect in use. As of August 2, 2022, the developers have probably released version 2.1.16.0. The reason for this release was a bug where auto-upgrade fails if the service account is in "UPN" format.
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I came across this issue via the following tweet – the version history of Azure AD Connect can be found here.
Note that auto-upgrade is not possible for Windows Server 2012 and Windows Server 2012 R2. Note especially myblog post Windows Server 2012 / R2 and the (upcoming) Azure AD Connect Sync issue as of Aug. 31, 2022 on this topic. After all, Aug. 31, 2022 is not that far away.
