I wanting to start migrating to Intune from SCCM, so I updated Configuration Manager to version 2002 including hotfixes rollup.
After I created a “Pilot Co-Management” group which currently includes all of our Windows 10 clients, and then set the Co-management settings as follows:
In Configuration Manager on Client Settings:
Unfortunately, however, currently only 578 devices out of 1700 of the “Pilot Co-Management” group appear in Intune as Co-managed, leaving most of them in the ConfigMgr state and therefore manageable only by SCCM. This also happens sometimes with "new" PCs, which remain linked exclusively to management via Config. Manager.