Earlier today, an application owner wanted his Windows Server 2003 SP2 VM restarted. So, I opened a Remote Desktop Connection (RDC) session to the VM and restarted it. After the VM started, I received the following exception when I tried to open an RDC session to the VM:
Since I could no longer login via an RDC, I used the VMware vCenter to open a Console session to the VM and did the following:
Checked if Remote connections were enabled (had to be enabled as I logged in earlier to restart the VM). This feature was enabled. So, (1) in the above exception message was ruled out.
Checked Network Level Authentication (NLA). It was not supported. So, (2) in the above exception message was ruled out.
I could telnet from my laptop to port 3389 on the VM. So, (3) in the above exception message was ruled out.
Finally, I just restarted the VM again and I was surprised to find that I could then open an RDC session to the VM.
So, restarting the Windows Server 2003 SP2 VM via the console fixed the problem. I later searched the www and observed that many users experienced the same problem and the “console operation” was used to fix the problem.
I haven’t found the root cause yet (not happy), but don’t have the time to look into it now …