From what I can tell, it doesn't seem like you can include anyone on the Internal Attendee's section when logging a call in Timeline (please correct me if I'm wrong here). It would be nice to be able to do so for cases when someone without a SFDC account (e.g. a Product Manager, Engineer, etc) is on a call with a customer.
Already have an account? Login
Enter your username or e-mail address. We'll send you an e-mail with instructions to reset your password.