Sending Message From Plugin To Form Not Working For Empty Values

I'm sending a custom message from a plugin (that does some validation) back to the CRM form. Here's my plugin code that executes on pre-Update and post-Create: //GetAccounts is a s

Solution 1:

You could set your field to something like OK instead.

This also allows to guarantee your code works ("is the field empty because it's supposed to be, or something is missing and it isn't being filled ?")