I'm trying to create a validation rule that when an opportunity is closed won will not save if the "Contract_Start_Date__c" and "Contract_End_Date_c" is not populated.
I have this:
Contract_Start_Date__c=null || Contract_End_Date__c=null
No syntax errors, but it does not work.
I also have this:
AND(ISPICKVAL(StageName, "Closed Won"), (Contract_Start_Date__c=null || Contract_End_Date__c=null))
No syntax errors there either, but it did not work either. :-(
Any advice to correct these?