I need to send invitation to a list of recipient under my boss'es email, whom i got access as 'delegate'
i tried using VBA to change the sender address when the emails are in outlook 'outbox' , however, I faced <run-time error 438: object doesn't support this property or method>
below is the code used, can any one help to see where has gone wrong and help me fix it, please?

thanks a lot