Windows Domain Integration for User Management

I have no idea what the technical complications would be, but it would be soooooo helpful if Aha! integrated with user account management done within our Windows domain.  Our shop uses a lot of Microsoft tools, particularly Visual Studio and TFS.  Identity/Account management is a problem for a MS shop that is trying out new tools.  Too many new tools leads that do not manage access through existing domains leads to a lot of user management overhead, and creates a security risk when dealing with attrition.