We have a TFS Collection Project Project ( let's call it ProjectA resident in TFS2015 Update2 ). Reviewing the web site for the security groups for the team ( http:\\TFS.XXXX:8080/tfs/Collection/ProjectA/ProjectA%20Team/_admin/_security?_a=members, under the Security tab I see the correct six members of the team.
If I now take Visual Studio and bring up Team Explorer within Visual Studio for the above Project. I have installed TFS Power Tools have onto my machine. If I click on Team Members I see six members. However Two of them are incorrect.
If I follow two paths within the Team Members window of Team Explorer, I can get to the correct six members.
1) Click Edit Team. the web display above diplayes the correct six members.
2 ) Click Providers: Click Disconnect next to Microsoft Lync. The display is now correct with the six members although they are all set as Unknown. Click Connect and the six members are set correctly.
Now if I close Visual Studio and start again they ( two wrong ) will appear incorrectly again in Team Explorer.
Interesting points :
1 This behavior is the same for all the users and not specific to me or my machine
2 These are active directory users as in the format xxxx\nnnnn.nnnn.
3 This is not specific to a particular project or collection.
4 This is not specific to the Visual studio version. I have noticed the same behavior with Visual studio 2013 and VS 2015.
It seems to be still caching a previous entry.