I have several computers... only one of which cannot authenticate to either my exchange or TFS server. (2 of the computers are at my home trying to connect to our exchange/tfs server at work, one of which as the problem). Several other employees have not had any connectivity problems.
The errors I am seeing are
401 2 2148074254
401 1 0
401 1 2148074252
After about 2 days of hunting around, I am about ready to repave the computer and start from scratch. As far as I can tell they are set the same.
I cannot connect to Exchange OWA using Firefox but not IE. Same for TFS. I have reset IE (using the tool at this URL: http://support.microsoft.com/kb/923737 -- if you have not seen it you should read the description, it is quite entertaining). I have compared the trusted site settings between the one that works and the one that doesnt. I have also compared the 'advanced' settings and can find no differences. The credentials work perfectly from the 2nd computer, which eliminates any firewall related filtering problems.
I am at a total loss as to what else to try. Does anyone have any ideas?