Update Dynamics 365 User FULLNAME

I am new to Scribe Online / SSIS but I am under the impression that you may update the existing D365 fullname values (if the Admin > Settings weren't changed first) using a SSIS tool. I have been attempting what should be an elementary task using Scribe Online but I am ignorant to this. Essentially, I need to look at the entire systemuser table, then simply concatenate the existing values for the fullname column as (lastname, ', ', firstname). Its asking me for match criteria which I guess I am not understanding what I am matching. I am only trying to update all systemuser values and not filter anything.

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