Ical parsing Propose new time with Outlook

I'm building a web application that sends meeting requests to user's Outlook. Every meeting request is created with a virtual organiser. Then, I have a service that is polling the virtual organiser's pop3 inbox to retreive attendees response to the meeting request (Accept/Decline/Propose new time).

All the information is parsed using the ICal string that outlook sends. Now I'm able to detect if an attendee has accepted or declined easily. I can also detect if the attendee proposed a new time but my problem is that there is no where in the ICal string I can fin the actual new time proposed, except in the email message, which is something I really don'T want to parse :)

Anybody knows where I can find the new time proposed without parsing the email messa开发者_开发问答ge itself?

thanks

I don't know how Outlook does these things, but the proper way to propose a change to the appointment date is:

• List item
• You send a METHOD:REQUEST, not a METHOD:REPLY.
• You identify the appointment you are referring to via the UID property.
• If you change the DTSTART, you propose to change the start date (DTEND for the end date...).

This is explained in iTIP, RFC 2446, 3.2.2.1, "Rescheduling an event"

So the information you need should be in the ICAL file