@Eric Goh Kheng Poo Thanks for posting in our Q&A.
For this issue, we appreciate your help to collect some information:
1.Did you deploy both EPM Elevation settings policy & Elevation Rule policy? If yes, please make sure that you set "Endpoint Privilege Management" to "enable" in EPM Elevation settings policy.
2.Open Event Viewer, navigate to Applications and Service Logs > Microsoft > Windows > DeviceManagement-Enterprise-Diagnostics-Provider and search for "mmp-c" match in all events. One of the events should include the error enrolling the device to MMPC (Microsoft Managed Platform Cloud).
If there is anything update, feel free to let us know.
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