Well actually they can add images as same as emails. but because they are stored as RTF (instead of HTML like normal email messages) so they convert to 4-5MB attachments.
The worst thing is the syncing problems with Windows Mobile devices.
PS: I think it should be easier to insert Live maps (or google maps) for directions.
![Figure: The Appointment with large image](https://bettersoftwaresuggestions.com/wp-content/uploads/2015/12/LargeAppointment.jpg)
Figure: The Appointment with large image