Here's the response I received back from LS email support this morning, and once I did their suggestion, and re-scan our User Base, the Local AD user scan started to work again and it picked up the rest of our users. Thanks to both LS Email Support and the Forum Admins for assisting with this issue.
We could see in the Errorlog.txt that connecting to your AD domain and retrieving users and groups is not the problem. So the configuration is correct. However, we did come across an error that is usually thrown when the user that is performing the AD Scan (the Lansweeper Service Account) does not have sufficient access rights on the entire AD domain.
Assigning permissions to AD users is done in Active Directory Users & Computers:
- right-click your domain, choose Delegate Control..., Next
- choose: Add and search for the AD user you use in Lansweeper(the Lansweeper Service Account), Next
- Delegate the following common tasks: choose Read all user information (see: screenshot) and Read all inetOrgPerson information, Next
- choose Finish
Please re-assign these permissions and Rescan the AD User/Group Path Scanning Target.