Device registration in Co-Management - Error 0x8018002b

Responding to a possibly deleted comment received by email, here is a bit more information that may help: 

The Co-Management handler logs are as follows:

Two of the errors that stick out to me are:

1. Merged value for setting 'CoManagementSettings_AutoEnroll' is 'False' CoManagementHandler 28/01/2021 10:05:26 AM 10380 (0x288C)
2. New merged workloadflags value with co-management max capabilities '255' is '1' CoManagementHandler 28/01/2021 10:05:26 AM 10380 (0x288C)

This issue seems to point to the SCCM collection being unable to set new values for Auto-Enrol & Capabilities. Note that I am no expert in SCCM and I am just presenting what i see in the logs.

Non-Compliant Devices (Active)

Unknown Devices (Inactive)

Note that all devices were active before the auto-enrol process was started and 1 of the inactive devices was successfully co-managed before having SCCM removed. 

Please feel free to reach out if any other logs or information would help investigate this issue.