I can't assign permissions to groups in visualstudio.com using the tool

Topics: For TFSAdmin Developers, For TFSAdmin Users, TFSAdmin FAQ
Aug 29, 2014 at 2:13 PM
I want to use the tool to assign permission to team projects in my project collection that is hosted in visualstudio.com.

I can connect and get my projects listed.

I can add a user, but when I commit the changes, it fails and I get the following stacktrace.
29-08-2014 15:11:19: Adding user:Windows Live ID\themightygugi@hotmail.com to Team Foundation Server role:Contributors
29-08-2014 15:11:19: Exception occurred
                       Type: System.NullReferenceException
                       Message: Object reference not set to an instance of an object.
                       InnerException: -
                       Source: TFSAdministrationTool.Proxy
                       Target: Void AddUserToRole(System.String, System.String, System.String)
                       Stacktrace:    at TFSAdministrationTool.Proxy.TeamFoundationServerProxy.AddUserToRole(String teamProject, String userName, String role) in c:\Code\tfsadmin\Main\src\TFSAdministrationTool.Proxy\TeamFoundationServerProxy.cs:line 407
   at TFSAdministrationTool.Controllers.MainController.OnCommitChange(PendingChange pc) in c:\Code\tfsadmin\Main\src\TFSAdministrationTool\Controllers\MainController.cs:line 109