Central User Administration (CUA) is the process that activates the distribution model.
In SAP, enter transaction code SCUA.
In the Maintain System Landscape dialog box, select the distribution
previously created (such as SAP2IDM).Save your entry.
You might see a message stating Unable to distribute the system landscape to system IDMDRV. This is an informative message and is not an error or issue of concern.
On some versions of SAP, all systems in the distribution, including the Identity Manager driver, must be accessible during this step. If a TRFC port is being used for the driver Publisher channel, the driver should be running to ensure connectivity and completion of the CUA configuration.