The DN of the domain validates and shows that there are computers in the domain, and the collection seems fine, but the collection is not being populated with computers.
The Integration Agent has not been started.
1. Open the PAR Admin screen
2. Select System Status/Settings | Integration Agent
3. Ensure that the Integration Agent is started by clicking the Start button if the Integration agent is stopped. Check the Auto Start when system restarts? box to ensure that the integration agent starts up the next time the TPAM appliance is restarted.
The Integration Agent will start populating the Collection. To make it start right away rather than wait for the next scheduled time, re-validate the DN by editing it, changing it back and clicking the Validate DN button
The Agent Log tab will show what the Integration Agent has been doing, if anything.