So I created a new DC recently and demoted an old one first.
I did a dcpromo and demoted the DC fine, I also did the meta data cleanup using the GUI as its a 2008 forest/domain, just made sure all references to the old DC was removed in users and computers (as thats the only reference that was left). I forced replication across all the DCs and left it a while.
I promoted the new one and all is well. dcdiag shows no errors, readmin /showrepl shows no errors and AD Replication Status Tool shows no errors.
When I run dcdiag /v I get invocation/latency issues as attached? My guess is that it is nothing major and to do with maybe an old DC before my time as it says Win2k DC, or possible a DC restore as that is when the invocation ID changes?
I am just curious for you AD guys out there to enlighten me as to what it is actually telling me.