Is there a supported way to hide to + add new button from lookup fields? Users need the ability to add record from main menu so cannot change security
Example below but a real use case.
Hide lookup field add new + button but user can still create record from main form
I don't believe there is a way to disable that option from the Out of Box lookup field, and the security roles are not details enough to define specific creation points on records (it's an all or nothing thing for create permissions).
You could maybe look at replacing the lookup field on the form with a custom PCF control? This would replace the default lookup field control and some of them have options to allow you to prevent new record creation.
Something like the above control changes the Lookup field to a dropdown, and I believe it allows you to prevent new record creation as well. The installation process is not too bad, but reply back if you run into any issues.
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