Workaround: The UPN entered must adhere to a yourname.admin@yourdomain format, for example if you log in using jsmith.admin@sqa.local as the user name but the UPN in the Active Directory is only set as jsmith.admin, the login fails. To correct the problem change the userPrincipalName value to include the needed @yourdomain content and retry login. In this example the UPN name should be jsmith.admin@sqa.local.