title: Update permission was denied on the object
body: <p>When I grant a specific user db_datawriter access to one of our databases, the permissions do not work.  I add the user's Active Directory account as a login, then map the user to the database.  I then log in as that user to SSMS and run an update query on a table.  This is the error I receive:
  The UPDATE permission was denied on the object 'tblSGDTSXOnOff', database 'GPS_UAT0', schema 'dbo'.
  If I try the exact same thing on a different user, it works fine.
  I see no explicit Deny permissions for the user, so I'm at a loss as to what is going on.</p>
  
  <p>Anyone have any suggestions?</p>