Trigger Unmap Operation from within a Synchronization Service Step

I am having several Synchronization Service workflows to synchronize information from various system to ActiveRoles.

However, since a re-mapping of user accounts is not necessarily performed when the mapping attribute changes (as GUID in AD is automatically being used as key), this is regularly causing issues.

Is there a way to trigger unmapping of a user and the connected system record from within the ARS synchronization service Workflow Step?

I have done something similar in configuring a fake update for an update combined with a Powershell Script that does validate the two mapping attributes and sends a notification email in case they differ, but that still does require manual interaction then. Ideally I could trigger unmapping of the current srcObj and dstObj objects within the same synchronization...

Does anyone know if and how that could be possible?

Thanks in advance.