Why does SharePoint create a 'Workflow Users' group automatically? I've noticed that this group doesn't appear when any workflow is created, it's only created when a specific type of workflow is created. Does anyone know what circumstances triggers this group to be created by SharePoint?
A little bit of google-fu gave me the answer:
We discovered that the cause is the 'Add Permissions' action in SharePoint designer. It does this to ensure users have 'Limited Access' permissions to the parent library, site, etc.