Using RDP to each serve in our development farm, we encountered suddenly following error:
Error Message: "The connection cannot continue because the identity of the remote computer cannot be verified"
We can still get RDP to the machine using it’s IP address, but not using the machine name – even not fully qualified with domain name etc.
The reason is the difference in time settings:
time settings at the target machine:
time settings at the machine with RDP client:
20 minutes difference caused the difference. After the time was synchronized, we were able to connect the target machine again.
Also a centralized time synchronization across the farm may be used to avoid the problem.
UPD: the problem seems to be known and mentioned at
http://developers.de/blogs/edin_mulic/archive/2009/08/18/cannot-establish-remote-desktop-connection.aspx