Calendar view and attachments


One of our users wants to see directly in the calendar view, if an
appointment has an attachment included.
There are symbols within an calendar item in this view for group or
private appointments, but not for attachments.
Clearly in the "all items" view you can see the existence of an
attachment immediately - but not in the calendar view.
We could create a rule-based solution with categories - but is there an
easier way?

We are using the GW 2012 SP2 client.
thanks in advance