Receive an error message on the workflow condition
On the high level, I would like to check in a workflow, if there exists a lead associated to an opportunity and a user is trying to change the campaign, then prevent them from doing so. I am getting an error message that Field LeadId is invalid.
Workflow is based on the Opportunity Object
Trigger Condition = Before Modified Record is Saved
My condition is: iif( [<Lead>] IS NULL, '','CANCELOPERATION')
Any suggetsion would be very valuable. Thanks, Nitika