I have multiple solutions that were previously mapped to a hosted TFS. Their local mapping was defined as well and all the source code was up-to-date locally. I have since discontinued my TFS subscription and started using visualstudio.com as my TFS server.
I went into one of the solutions, deleted the *.vssscc files from the solution and the *.vspscc files from each nested project. When I open the solution in VS 2013, the output window gives me a message saying the the original TFS (unsubscribed now) is not available and that the solution is open offline.
As a result, when I choose the "Change source Control" option, it first asks me to log in to the old TFS whose credentials are no longer valid.
Furthermore, it tells me that the local directory I am trying to map to the new TFS is already mapped to the old TFS. How can I remove this mapping without having access to the old TFS?
The answers here work when the old TFS server is available. Mine wasn't but has not been removed from the server list in VS. Removing that entry allowed me to remove the solution from source control entirely along with the mapping and add it to another source control server.