Just an FYI:

There's a bug in ZAM where if the inventory service is ever
stopped/restarted (ie, PRU or other update/patch), then the PC's will
never scan again until the collection service (ie, services.msc) is

Restarting the Collection service via the ZAM Console is NOT sufficient.

Once the service is restarted, the machines will begin to scan.

I couldn't figure out why our pc's weren't scanning on Thursday
(once/week) or on days AFTER Thursday (ie, pc was not turned on on
Thursday, but got powered on on Friday).

That's the reason why.

I have no ETA on a fix, but Novell confirmed it is a bug.