title: SharePoint "user does not exist or is not unique" error, on site restore
body: <p>We backed up a site on our development server and restored it to our production server on a different domain.<br />
  To clear up all the users on the site we used the web.SiteUsers.Remove() for all users on the root web, on our dev site.<br />
  On taking a backup and restoring to the production server using stsadm, we are now getting the error "user does not exist or is not unique" during the restore process which is failing (at the stsadm -o restore command itself). <br />
  Any pointers to a solution to this or what are we doing wrong would be welcome. We are  looking to remove users from the site collection before restoring to production.<br /></p>
  
  <p>Kind regards,</p>