TFS Source Control Explorer -no commands shown

We needed to setup TFS for a new user and he had a problem:
When open TFS Source Control Explorer , he can see folders, but was unable to run any commands , e.g Get Latest.
Trying to find a reason, we gave the new user different security permissions, but it didn’t help.
Finally I suggested to check in VS Tools/Options/Source Control/Current Source Control Plug-in. and ensure that
VS TFS is specified.
It fixed the problem.