Can’t get in Central Administration

Apparently within the last 3-4 weeks we lost our ability to get into Central Administration. Now when I or the other SA tries to get to the URL with port it asks us to authenticate again and doesn’t take our credentials. (Directly on server, as we’ve always done it.) Tried our domain accounts and local admin account on the box.

We were trying to get in there because some Sharepoint database on C: exploded in size the last week or so and filled up the drive and the setting is in… Central Administration. It’s awesome troubleshooting an interface to be able to get in to troubleshoot the initial problem.

No changes have been made on this server as the departing SharePoint guy apparently left them in a test OU with no GPOs, it doesn’t have firewall/McAfee… Not sure what could have changed.

Appreciate any advice.