Some computers are not imported into the Notification Server console after the Import Computers in 'Import Microsoft Active Directory' runs.
When checking the Organizational Views and Groups or checking the custom report showing computers with OU assigned, many computers which actually are part of an OU are not showing up there.
ITMS 8.x
The Resource Import Rule to import computers is configured to import 'Some Computers' and not all of them.
After checking the import constraints we found that the option ''computer account password changed in the last 30 days" is selected:
Uncheck the 'Import computers which computer account password changed in the last 30 days' or select to Import all computers instead as shown here: