Please help! I have a client who has Windows 2003 Server SBS with SP2. Starting last thursday morning, no one could login to Exchange, so I restarted the server and then everyone could log back in. The same thing happened again Friday morning. A restart fixed it again. Guess what, this morning, the server was locked out again. This time I couldn't even log on as Administrator.
I checked the event viewer and there are loads of errors.
This error comes up far more than any of the others:
10/13/2008 8:40:44 AM KDC Error None 7 N/A SERVER The Security Account Manager failed a KDC request in an unexpected way. The error is in the data field. The account name was "username" and lookup type 0x0.
I can't figure out what the problem is to save my life. There are other errors as well, such as this one:
10/13/2008 5:20:47 AM W32Time Warning None 22 N/A SERVER The time provider NtpServer encountered an error while digitally signing the NTP response for peer 192.168.1.3:123. NtpServer cannot provide secure (signed) time to the client and will ignore the request. The error was: A device attached to the system is not functioning. (0x8007001F)
If anyone has any idea what could be causing these problems, please let me know. I have tried netdiag and everything passes.