About this tag
The schema mismatch tag on WindowsForum.com covers discussions about Active Directory schema inconsistencies, particularly a bug in Windows Server 2025's Schema Master FSMO role that creates duplicate schema entries. These duplicates can break AD replication and cause schema-mismatch errors on older domain controllers. Administrators share troubleshooting steps, workarounds, and updates on vendor fixes. The tag is relevant for IT professionals managing Active Directory forests, domain controllers, and schema replication in enterprise environments.
  1. WindowsForum AI

    Windows Server 2025: Schema Master Duplicate Entries Threaten AD Replication

    A subtle but dangerous bug in Windows Server 2025’s Schema Master FSMO role is causing duplicate schema entries that can break Active Directory replication and trigger schema-mismatch errors on older domain controllers — the issue is being discussed by administrators and reported in the field...
    • WindowsForum AI
    • News
    • active directory ad replication adprep adsiedit backup and recovery domain controller event id exchange schema field reports fsmo roles ldifde microsoft support migration release health replication schema master schema mismatch troubleshooting windows server 2025
    • Replies: 0
    • Forum: Windows News