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can USN rollback happen during authoritative restore?

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Last Modified: 2017-05-17
can USN rollback happen during authoritative restore?
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AlexA lack of information provides a lack of a decent solution.
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Commented:
Authoritative and nonauthoritaive restore explained very well but I didn't get the answer. When you perform authoritaive restore the version number would be increased so I want to understand How can USN rollback happen even after this?
AlexA lack of information provides a lack of a decent solution.
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Because it's been restored incorrectly

This article describes a condition that occurs when a domain controller that is running Windows 2000, Windows Server 2003, Windows Server 2008, or Windows Server 2008 R2 starts from an Active Directory database that has been incorrectly restored or copied into place. This condition is known as an update sequence number rollback, or USN rollback.

So you asked if it could happen, answer is yes, it can.

Have you read the second post, that's how to detect and resolve USN rollback, if you've confirmed this to be the issue then you can use the same article for the resolution.

Regards

Alex

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Commented:
Thanks for the answer. When you say restored incorrectly that means Invocation ID hasn't reset, right? If yes, I just want to understand the scenario where we authoritatively restored the OU tree and invocation ID hasn't  reset but the Version number has increased for each attribute and it will notify all the downstream Domain Controller about the changes, will USN rollback happen in this case?
AlexA lack of information provides a lack of a decent solution.
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Commented:
I have no idea... Mainly because you've not done it correctly

By modifying the Invocation ID it informs the downstream replication partners of this restore operation and we can get around USN rollback scenarios. It also instructs DC1’s replication partners to send all updates from highestCommittedUSN (x) to highestCommittedUSN (y) where X is the value at the time of the backup and Y is the value at the time DC1 went down to perform the restore.

If you haven't done the invocation ID, the downstream servers aren't going to see the restore operation.

You'll have to see if there are issues after you complete the work I guess.,

Author

Commented:
This is talking about the Nonauthoritative restore.

By modifying the Invocation ID it informs the downstream replication partners of this restore operation and we can get around USN rollback scenarios. It also instructs DC1’s replication partners to send all updates from highestCommittedUSN (x) to highestCommittedUSN (y) where X is the value at the time of the backup and Y is the value at the time DC1 went down to perform the restore.

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Commented:
Could anyone please answer it?
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I got this answer later when nobody was able to answer.

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