How do you remove the expiration for calendar appointments that you set in the future and then want to update? I like to setup recurring appointments for months in advance, that way they're in the everyone's calendar. When i want to update it, I get a warning message that the "The expiration date and time for message have passed. Do you still want to send it?" I try to say yes, but the message does not send. I know how to remove/change the expiration date for an email message, but can not for the calendar appointment...this frustrates me!