This morning I came into work and had about a dozen calls right off the bat with people either not getting their drive mappings or getting Access denied.
We have 2 DCs in a single domain, each DC is in a separate building. We use a KIX script for drive mappings.
I sat down at DC1 logged in with the domain admin account and also got Access Denied to the Network Drives which are shares located on a NAS.
I remote logged into DC2 with the same Domain Admin account and had no problems at all. I logged on to my PC and had no problems.... Only a small number of users actually had problems.
I restarted DC1 and still got the Access Denied. I then called one of the users having the problem, and had them log on to their computer with a test account.
When they logged in with the test account they got all the mappings and they were able to get into everything. I had them log out of the test account and log back into their account and it was now working perfectly.
So, I went to DC1, logged off, logged on with another account, everything worked, so I logged off and logged back on with the Domain Admin account again and everything worked.
I checked event logs on the DCs and a couple of the problem PCs and there was nothing out of the ordinary at all.
The problem is gone for the moment, but I don't know what caused it, so I don't know if we have a potentially bigger problem. Any Ideas?