Ok everyone I am at a loss with this....
I have:
1. Co-management configured between SCCM 2010 and Intune
2. AAD Connect configured for Hybrid join devices show up named correctly and as "Pending" (all good)
3. No GPOs in place using SCCM client settings
4. Azure AD P1 licenses and Intune licenses assigned
5. No Proxy or firewall rules in place
I am testing on 5 pilot devices, all devices are in the same SCCM collection. 1 device is completing the ADD Hybrid join process and is auto enrolling into Intune as expected which leads to believe all Co-management and Hybrid Join settings are correct.
The other 4 devices, after about 8 hours their names change to a Device ID GUID (see image) they also will not auto enroll into Intune as expected.
I have run the connectivity testing tool and the dsregtest as well as done whole dsregcmd /leave and /join. This will fix the device names in AAD but after a time they revert back to the GUID and still no Intune enrollment.
I see the following info and error under Applications and Services Logs/Microsoft/Windows/DeviceManagement-Enterprise-Diagnostics-Provider/Admin in Event Viewer:
Error:
eventid 201
MDM Session: OMA-DM message failed to be sent. Result: (Unknown Win32 Error code: 0x80072f8f)
Information:
eventid 206
MDM Session: OMA-DM session started for user: (NULL)