We're trying to configure Access Levels for an on-premise TFS 2015 server as explained here.
However the "Access levels" tab in Control Panel is not visible to our TFS Administrator. He has administration right for both the Team Collection and Team Project. We're not running TFS Express, so this should be available to us.
This leaves us wondering, what are the requirements to be able to configure Access levels in TFS 2015? Is there something we are missing?