Wow, that’s a toughy! I would suggest you re-enable the account and then open it in it’s own profile (you could do a restore of the account if necessary if it is already purged off the exchange server). You can then change the calendar view to recurring meetings and arrange them by location. That’s the easiest way I can think of. Add the Organizer field using field chooser and that will show you the ones in which this person was the organizer.