When you remove members or groups from a site they can no longer access it, but if the
      site is public they can rejoin it.
    Note: Only a site manager can remove members from a site. 
    - In a site click Site Members, or More then Site Members if the site has additional features.
 - Select Users or Groups.
 - 
        Search for the site member or group you want to remove.
        
Type a full or partial name, or leave the search box empty to display all members or groups.
 - Click Remove.