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Exchange Team Blog
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Active Directory schema extension issue if you use a Windows Server 2025 schema master role

Nino_Bilic's avatar
Nino_Bilic
Icon for Microsoft rankMicrosoft
Oct 09, 2025
Working with our Windows Team counterparts we have become aware of a specific set of circumstances that might affect your on-premises Active Directory environment replication after you install a rece...
Published Oct 09, 2025
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bbzome's avatar
bbzome
Brass Contributor
Oct 10, 2025

Well... i've upgrade to Exchange SE and later upgraded DC's to 2025.
I'm not running into AD replication issues (yet), but i'm stuck because AD and Forest functional levels were upgrade to 2025.
What happens if SE CU1 comes out before Windows fix?