I have trouble writing validation rules in Salesforce. So I have a checkbox field BypassWF__c which when checked bypasses workflow. I have three fields AssignedToUser__c, SupportUser1__c and SupportUser2__c. So if any of these 3 fields is updated (ISCHANGED), an email alert will be sent. I'm able to do for 1 field:
AND( NOT($User.BypassWF__c), OR(ISCHANGED(AssignedToUser__c), ISNEW()) )
How do I add if any 1 or both SupportUser1__c and SupportUser2__c are updated?