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Level 8

Server 2003R2 Updates/USN Rollback

On a weekend about a year ago I decided it was time to do some updates on our 2003R2 domain controllers.  One of them, after the updates, failed to boot.  (un)Luckily I had created a snapshot before I did the updates, so I just rolled back to the last snapshot and everything was('nt) back to normal.  Not long after I reverted and booted up I started noticing all kinds of authentication and replication errors.  As it turns out using snapshots on Server 2003R2 is a horrible idea and gets the USN all out of whack.  I don't remember the exact steps I took to fix the issue, but it was certainly a few hours more than I wanted to spend on my weekend.  I am very glad to be on Server 2012R2 and don't have to worry about USN rollback issues any more!