PfiUserProfile in Landmark

I should be alittle more specific... I'm having difficulties narrowing down documentation(purpose and necessity) for this table. We have migrated over the years from being a lawson core user of workflow in which we used tasks and approvals.  Back then if a user was not defined in the PfiUserProfile table they had no access to inbaskets, approvals, etc.  Over the next several years we migrated our inbaskets and approvals over to landmark.  We are now migrating up into the OS system and have changed alot of things. We also have a workflow that pulls users resource management and adds them into the workflow user table=PfiUserProfile. I have a user that is failing on the add.  Since we have progressed our workflows, and no longer use tasks, is it still necessary to populate this table?