Hi, Susan,
Put the person at the front counter back in the NoCost group.
Then, in PO, edit the group the person at the front counter belongs to. Click on 'Expand all' so you can see each of the options in the tree. I think you'll find that all of the options have been deselected which is why, when this user logs into PO, all of the buttons are inactive.
Check/turn on each option this user should have access to in PO.
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Regards,
Softrak Tech Support