I have several devices that have previously been enrolled in Intune as Hybrid Azure AD Joined after which the licenses for Intune expired. Several months later, the Intune licenses are active again, but some devices seem to experience issues syncing.
I checked the Event Log and this error corresponds to MDM Session: OMA-DM message failed to be sent. Result: (Bad request (400).).
However Error 400 is quite generic, what can I do to troubleshoot this?