I've managed to hook up AX 2009 to TFS 2012. When you connect AX to TFS for the first time, a TFS workspace is automatically created with the following naming convention: <computer name>_AXWORKSPACE<numerical suffix>.
I have 3 AX environments (Dev, Test, Stage) that I'm trying to connect to TFS. I've somehow gotten AX/TFS into a state where it's trying to assign the same numerical suffix to all 3 environments. It then complains that the workspace already exists when TFS tries to create it again. I've already tried creating new folders in TFS and mapping to a new local path. There must be some place in AX or TFS where the next numerical suffix is being stored. Thanks for your reply.