I am using active directory import connection and I am not able to update the selected containers for the synchronization connection. I just opened the edit connection page, enter the synchronization account password and click Populate Containers, scroll down and unselect a currently selected container and click OK. The system showing the change is saved but if I go back the page that display the users and refresh it, unselected users still there. I tried to create a new connection to the Active directory and select the containers I want, then start the full crawl search. Even after 24 hours, I still have the old users!