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From: Skip Collins <skip.collins@gmail.com>
Subject: Re: Recurring events with exceptions
Date: Fri, 21 Oct 2011 17:48:38 -0400
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To: e.fraga@ucl.ac.uk
Cc: emacs-orgmode@gnu.org, kjambunathan@gmail.com

On Wed, Oct 19, 2011 at 6:02 AM, Eric S Fraga <e.fraga@ucl.ac.uk> wrote:
> Yes, I have been informed that we are moving to Outlook/exchange in the
> new year, something I am dreading... =A0Matthieu Lemerre, on this list
> back in late June (Message-ID: <871uygg1fs.fsf@free.fr>), posted a
> (partial?) solution that helped in this regard. =A0I've not tried that
> solution as I don't have to use Outlook yet. =A0Search the mailing list.

Lemerre's approach only syncs with the Outlook client, not the
Exchange server. He suggests using RFC-2446 (iCalendar) as a basis for
a more general solution. I think that trying to establish a smoothly
syncing connection between org and exchange by using iCalendar is a
recipe for frustration. This is mostly because Exchange's
implementation of the standard is lacking.

It might be more fruitful to pursue an org interface to Exchange Web
Services, which is favored and privileged by microsoft. A hypothetical
org-ews.el would pass xml messages that look something like:

<?xml version=3D"1.0" encoding=3D"utf-8"?>
<soap:Envelope xmlns:xsi=3D"http://www.w3.org/2001/XMLSchema-instance"
               xmlns:m=3D"http://schemas.microsoft.com/exchange/services/20=
06/messages"
               xmlns:t=3D"http://schemas.microsoft.com/exchange/services/20=
06/types"
               xmlns:soap=3D"http://schemas.xmlsoap.org/soap/envelope/">
   <soap:Header>
      <t:RequestServerVersion Version=3D"Exchange2010" />
   </soap:Header>
   <soap:Body>
      <m:CreateItem SendMeetingInvitations=3D"SendToNone">
         <m:Items>
            <t:CalendarItem>
               <t:Subject>Dentist Appointment</t:Subject>
               <t:Body BodyType=3D"Text">The appointment is with Dr.
Smith.</t:Body>
               <t:Start>2009-03-02T17:00:00Z</t:Start>
               <t:End>2009-03-02T19:00:00Z</t:End>
            </t:CalendarItem>
         </m:Items>
      </m:CreateItem>
   </soap:Body>
</soap:Envelope>

Perhaps we could entice Jambunathan to take this on ;-)
His experience getting org to speak xml as a way to interact with
other systems would be invaluable.