Check ServiceNow Users Domain
For your ServiceNow users, make sure the domain is populated with the FQDN (Fully Qualified Domain Name) of your domain. To check this, you can navigate to "sys_user.LIST".
Click the cog wheel icon in the upper-left of the User List. Select "Domain" from the Available list and click the right arrow to move it to the Selected list. Click "OK":
The domain column will now be displayed in your user list. You can now verify that the domain is the FQDN.
If the domain is not showing as the FQDN, you will not be able to edit the domain field on the form. To do this you can use a script we have created to parse the domain from the LDAP source and populate the domain fields. You can access that here.
Check Shift Left Permissions
If you're still experiencing issues, make sure that Shift Left has the necessary permissions. Below is a list of the system tables that Shift Left needs permissions to: