Can you please try to use the following report:
Select Top 1000000 tblADusers.Username,
tblADusers.Displayname,
tblADusers.email,
tblADusers.EmployeeID,
Replace(Replace(Replace(Replace(tblADusers.OU, 'OU=Users,', ''),
',DC=domain,', ''), 'DC=com', ''), 'OU=', '') As Department,
tblADGroups.Name
From tblADusers
Inner Join tblADMembership On tblADusers.ADObjectID =
tblADMembership.ChildAdObjectID
Inner Join tblADGroups On tblADMembership.ParentAdObjectID =
tblADGroups.ADObjectID
Where tblADGroups.Name = 'internet users'
To use the report above, do the following:
•Open the report builder under Reports/Create New Report.
•Paste the SQL code we provided at the bottom of the page.
•Left-click somewhere in the upper section of the page so the code applies.
•Give the report a Title and hit the Save & Run button to save it. Export options are listed on the left.