If the supplier is not appearing in the search, it's likely that the party has been blacklisted. To resolve this:

1. Go to the Vendor/Client Master.

2. Locate the Blacklisted flag and uncheck it.
   
   

3. If the flag is not visible, navigate to Form Field Authorization [122] and enable permission to view/edit the field.

This will make the supplier searchable again in relevant forms.