Microsoft: Sept Windows Server updates cause Active Directory issues

Microsoft has confirmed that the September 2025 security updates are causing Active Directory issues on Windows Server 2025 systems.
Windows Report

Microsoft Confirms Directory Sync Failure on Windows Server 2025 for Large AD Security Groups

Microsoft has confirmed that a new bug in Windows Server 2025 causes directory sync failures for AD groups with over 10,000 members.
Computerworld

Microsoft releases out-of-band updates to fix reporting error

Microsoft has released emergency patches to fix an apparent reporting error in Active Directory (AD) Group Policy, which allows administrators to manage and configure ...