I work for a law firm where many of the secretaries have a lot of access to
their respective attorney's inboxes and calendars.

Recently, I changed an in-house scheduling system from using a DLL that
generated invitations, to a more simple system that attaches .ics files to
HTML e-mails.

The problem is that when the secretaries open attachment from the e-mail in
their attorney's inbox and [Accept] the appointment, it goes into their (the
secretary's) calendar, and not in the calendar of the recipient of the e-mail.

I have no ATTENDEE attributes in the iCalendar attachment, and have yet to
figure out the exact syntax to include in those attachments so that the
secretary's Outlook client knows that the appointment belongs in her
attorney's calendar and not her own. I've tried duplicating the delegation /
permissions typically setup in our firm, but nothing I've done has been able
to reproduce the functionality they need.

Has anyone out there had to accommodate for this situation? I have access
to the active directory info, etc, so I think I have the pieces of data
required...I just need to know how to do it.