Hi Taylor
If you are using the salesperson table in OrderEntry (or Invoices, I think), then the salesperson entry will be validated if you check off the Field Verification box under File | Options. That box, like all of the boxes under File | Options, are workstation specific, so you must go around to all workstations and check it off.
I believe in a future version of Adagio, Field Verification will be mandatory.
Steve