With the release of System Center Configuration Manager Current Branch 1906 (SCCM Current Branch), the co-management feature has been improved to allow you to define different device collection while piloting co-managed workloads.
With the previous release you were able to pilot the co-management for specific workloads (compliance, device configuration, Windows Update…) but the piloting applied to one specific collection for all defined workloads.
Now you can select different collection for each co-managed workloads.
From the SCCM administration console, reach the Administration\Cloud Services\Co-management workspace and edit your co-management settings
Then reach the Staging tab and define the collection you want to use for pilot the specific workload