Inventory is showing "Unknown Windows" for the Operating System on a lot of systems.
Also systems are showing up with "No Tracking Data" in the Console
Running a Basic Inventory on these systems brings the system back to 'green' status with a Known OS name, and valid tracking data.
Using Domain Membership/WINS Import task
Domain Membership/WINS import task uses older APIs and is not recommended to run repeatedly in an environment.
Recommended replacement: Use the Microsoft AD Import task to bring in systems from AD. We get a lot more information from AD Import and it doesn't cause issues with existing systems in the Console.
If Domain Membership/WINS import task is not being used and systems still show untracked, check the following article:
Computers are showing untracked in console