I know I have to add an onchange value to the regardingobjectid field in order to get it to auto populate the Subject field for me. I am trying to get the subject field to auto populate the exact value or string which appears on the regardingobjectid field.
Example: If I choose an Account 'ABC Pty Ltd' in the regarding list of the Phone Call Activity form I would like it to write 'ABC Pty Ltd in the subject field automatically. It will save our guys having to re-write the Regarding field into the subject field.
I have tried: 'crmForm.all.subject.DataValue' = 'crmForm.all.regardingobjectid.DataValue';