I recently installed Visual Studio 2012 (RTM) and a project collection is missing from the Team Project Collections list in the "Connect to Team Foundation Server" modal window. The project collection is listed in VS 2008 and VS 2010. The collection state in TFS Administration Console shows as online. This is not a recently created collection it is over 2 years old with many projects. Share Point, Web Access, and Reporting Services sites all work fine. I have run Best Practices Analyzer and did not see anything that stood out although it contained a lot of information and I could have overlooked something. We are running TFS 2010 which was upgraded from TFS 2008.
Any help would be much appreciated.