Server Configuration > User and Group Permissions > Refreshing Group Cache
  
Refreshing Group Cache
The GUI may not display all changes to Windchill RV&S groups, if there are changes to the groups in the underlying realm, because the Windchill RV&S server does not automatically refresh its cache. You can refresh the group cache by performing the following:
To refresh the group cache from the Windchill RV&S administration client, right click the Workflows and Documents node, and then select Refresh User and Group Cache.