RE: Verifying field against another field in another entity
Hi partner,
As I known, we could customize the columns of look up view as we need, so that we could see all fields that we want in custom lookup view not just the Name filed.

According to your question, I wonder if you mean you want to search in lookup view with other fields like Tel, address...?
If so, we could open the entity's Quick find view and Add find columns.
For example, I want to search main phone in account lookup filed, I should do the following steps.



If that's not what you mean, please kindly share more information.
Hope it helps.
Best Regards
Leo