Retrieve custom properties of a message/appointment from each mailbox
Currently the custom properties stored within an item are scoped to the user's mailbox. It would be great if we could access them everywhere. For example a scenario:
Compose form which will store facilities required for a meeting within an appointment. In webmail the receptionist could open the read form of the appointment and see all the required facilities stored in custom properties.
Currently this is not possible, because the receptionist is viewing it from another mailbox where the custom properties are not available.