Hello all - I made so many stupid moves in this one I don't know where to begin, but maybe one of you can help. The long story short is:
I joined a new DC (hostname DB65BFF3) to an existing domain
Promoted it to DC
Demoted the old DC (hostname ny-dc-01)
Renamed ny-dc-01 to be ny-dc-old
Renamed PDC to be ny-dc-01 so all existing shares and workstations would look to it without breaking connection
All the shares and DNS are working, but my AD is now down (for obvious reasons). Any commands I try now fail. DCDIAG shows the correct home server name, but still shows the old server name for default first site name. I cannot open AD User and Computers or any other AD application without it throwing errors that it cannot reach the domain.
I tried to rename the server back to the original name and that failed. I even tried a Hail Mary of renaming from the GUI which failed.
My obvious mistake was not having a BDC running during the rename process, but it's too late to fix that now.
Is there anything I can do? What about promoting the old server back to a DC and seeing I can join the domain? The metadata might still be there and it's still joined to the domain. Could that work?
Thank you kindly,
Tom