Intune

Intune device not syncing: the full diagnosis order

The checks that actually narrow it down, in the order that saves the most time.

Intune device not syncing: the full diagnosis order — Intune article banner on grbadhon.com

Nine times in ten it is the MDM certificate, and you can rule that in or out in under a minute.

Start at the certificate

Check the enrollment certificate expiry before anything else.