
1 answer

try this. You want both Comments and Benefits to be required. when you fill in some text for comments, then the validation is no long valid because your comments__c != "" anymore. So you want to use the "OR" statement to check if either of the Comment or Benefits is blank.
AND(
OR(ISPICKVAL( Owner_Role__c , "CSA"),ISPICKVAL( Owner_Role__c , "CSM")),
OR (ISBLANK(Comments__c), ISBLANK( Benefits__c ))
)