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Networking, DNS & Active Directory

USN rollback on a domain controller (Event 2095)

Event 2095

A domain controller restored from a snapshot or backup quietly stops replicating, leaving it permanently out of sync with the rest of the domain.

What you’re seeing

  • Directory Service Event 2095 reporting a USN rollback on this domain controller.
  • The domain controller has paused inbound and outbound replication and the Netlogon service may be stopped.
  • Changes made on this DC never show up on other domain controllers, and vice versa.
  • The issue appeared after a VM snapshot was reverted or the server was restored from an image backup.
  • Users authenticating against this DC see outdated passwords or group memberships.

Common causes

Every environment is different, but these are the causes our engineers find most often:

  • A virtual machine snapshot of the domain controller was reverted, rolling back its database without Active Directory knowing.
  • The DC was restored from a disk image or backup using a method that is not supported for Active Directory.
  • The hypervisor or Windows version does not support VM-GenerationID safeguards for virtualized DCs.
  • A physical-to-virtual conversion or cloning process copied an old copy of the AD database.
  • Disk-level restore tools reverted the system volume while leaving replication partners unaware.

Why it matters

A USN rollback leaves a domain controller in a state where it can't be trusted, and Windows deliberately quarantines it to prevent damage. Changes made on that server since the rollback may be lost, and authentication can be inconsistent until it is dealt with. If the affected DC holds key roles or is the only DC at a site, staff may face logon and access problems. The situation must be handled carefully to avoid spreading inconsistencies through the rest of Active Directory.

How AskTechGurus fixes it

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Tell us what’s happening

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A certified engineer diagnoses it

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Fixed and verified with you

The engineer resolves the root cause and confirms with you that it’s working. You don’t just get a workaround, and you get a plain-English summary of what was wrong.

Pay only when it’s resolved

Fixed price from $99, invoiced only after you approve the fix. If it isn’t resolved, you don’t pay.

Frequently asked questions

Can't we just restore the snapshot again?

No. Reverting snapshots is what usually causes this. The affected DC typically needs to be properly removed and rebuilt, which an engineer can plan with you.

Have we lost any user accounts or changes?

Changes made only on the affected DC may not have reached the others. We confirm which changes are at risk before taking any action.

How do we stop it happening again?

Proper backup methods and hypervisor settings for domain controllers prevent it. We'll explain what went wrong in plain English.

Still stuck? Let a pro take it from here.

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