SugarCRM CE v6.1.0 (but I'm going to 6.3.0 today!)

I've been informed that a few of our clients are missing Meetings with us because, and I quote, "I didn't see the little accept button," and I've been advised that our meeting invitations have to be automatically added to clients' diaries.

Is it possible, through iCal Patch or some other means, to automatically attach corresponding iCalendar requests to meeting invitations?