Recently upgraded mailboxes from 2003 to 2010. When sending appointments to an outside mailbox @me.com (Apple based) the appointment format is lost. When sending from the 2003 environment a .ics file was attached to the email and user could simply open the .ics and accept the appointment. The 2010 appointment email does not have a .ics file attached. 2010 appointments to gmail and other smtp addresses seem to work fine only having issues with me.com. Are there any exchange settings that need to be set? or something @me.com that anyone knows about?