Hi guys,
I met a strange issue. When a server joining domain, there shows the following error occurred attempting to join the domain, the specified network name is no longer available.
The domain controller and the client server are all windows 2012 R2 and in different location.
I have tested dns with nslookup and looks fine.
Ports UDP 53 88 138 working, TCP 53 88 389 445 636 working.
UDP 137 can't be connected. But this didn't seem to be the cause.
Any suggestions?