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Problem: When running DCDIAG on my Server 2008 domain controller, I get the following error:
REPLICATION LATENCY WARNING
(DC name): This replication path was preempted by higher priority work
from DC1 to DC2
Reason: The operation completed successfully
The last success occurred at (never)
I tried DCDIAG /fix without any luck and ran DCDIAG on my other DC’s and didn’t get the error.
Solution: I went into Active Directory Sites and Services and checked the NTDS settings of the two Domain Controllers named in the error. Turns out that DC was set to replicate with a DC that was no longer on my network. Changed the replication to the proper DC, waited about 30 min and the error was gone from DCDIAG.