After you migrate a user from a different Active Directory domain, the user can no longer access Windows SharePoint Services ??
yeah, if you get the error message “The Login Name does not exist” i think probably is due to the user migrate from one domain to domain. After do some search at internet found have a lot good information. so i would like to share what i have found at internet.
Here > from Microsoft , tell you what STSADM can help on this
Here > Tell how the stsadm work, can see from SQL table. this is cool!!
Here > more step to let you check what permission the old account have :D