I've inherited two horrible servers (don't ask), and it turns out that it uses FRS to replicate the sysvol between the PDC and the second DC. (I checked the registry key)
I tried using https://docs.microsoft.com/en-gb/windows/desktop/VSS/backing-up-and-restoring-an-frs-replicated-sysvol-folder which is very helpful and informative, however, after I tried the non-authoritative D2 restore my sysvol folder contents just got deleted and the share itself got removed as well if you can believe that. It did save the pre-existing files in it, however, after a 2nd D2 restore it even deleted those. (good thing I backed all of that up)
Why would this delete the share even, I can understand it deleting the contents of the folder as that's what it's supposed to do, but the share itself?
Both servers are 2008 R2, no idea if they were 2003 before.
Is it because I didn't perform "Step 2 Restore the backed-up data to the SYSVOL folder."? That step did not seem listed anywhere else online and didn't make much sense since data should just resync from the good sysvol on the other server, right?