I am attempting to create a Task Validation Rule where if the Task Type picklist field contains one of three task types, then the WhoId field cannot be left blank.
This is what I have so far, but I keep getting the syntax error: Error: Syntax error. Found 'Task'
ISPICKVAL( Task Type, "Implementation Call"
|| Task Type, "PR 1 Call"
|| Task Type, "Renewal Call")
The text name of the field is "Task Type" - is there some rule in SFDC that a field name cannot contain Task? Is that my problem or is it something else?