I migrated our old TFS 2010 server to a new TFS 2017 last week. Everything seemed to be working fine. Until someone asked to start a stopped collection he needed to work on. I added him to the Collection administrator group, but we he goes to Visual Studio 2015, he can't see the team projects. When he uses the web interface, he can see the projects but still can't do everything. (can't add users to a group in a project)
Even I as a TFS Server admin, can't add users to a specific group in a projects. Has somebody seen this behavior before? I thought that the collection admins have full control over de projects in a collection. Does VS2015 need a update/patch in order to work properly with TFS 2017?