FSMOcheck sometimes failes

Question

How can I determine what is the cause why FSMOCheck sometimes fails?

Answer 1

Not much to go on, might check the domain health, also check the event logs for clues.

Answer 2

Hi @Janus Bariñan ,

adding my 2 cents:
I suppose @Dave Patrick meant "dcdiag /v", which you can run at the exact same time when the issue occurs. You can redirect the output to a file, is just easier to read:

dcdiag /v > dcdiag.txt  

If the issues are intermittent, they could be related to an underlying network issue for example. In this particular case you would see some RPC-related errors in the output (and most probably also in the event logs as DSPatrick mentioned).

Hope this helps!
Regards,
Stoyan

Answer 3

If further assitance is needed then please run;

Dcdiag /v /c /d /e /s:%computername% >C:\dcdiag.log (run on PDC emulator)
repadmin /showrepl >C:\repl.txt (run on any domain controller)
ipconfig /all > C:\dc1.txt (run on domain controller 1)
ipconfig /all > C:\dc2.txt (run on domain controller 2 if exists)
ipconfig /all > C:\dc3.txt (run on domain controller 3 if exists)

Also check the domain controller System and Replication (DFS or FRS) event logs for errors since last boot. Post the Event Source and Event IDs of any found

then put unzipped text files up on OneDrive and share a link.