G'day Alex,
Good point. Kerberos is very touchy about timestamps.
Just to explain for anyone reading this, Windows Authentication uses the Kerberos protocol. Part of the protocol is to encrypt the ticket using the current Timestamp, so long as the time between tickets is not more than 300 seconds, the ticket is valid.

Although I don't think this is the problem here, because Zeki is getting the "Multiple connections" error. Not "access denied" as I would expect for the Timestamp issue.

But I agree, syncing time across your systems makes life so much easier!
Rgds Ben