So I want to add an iCal file to a web page, so that people can add an event to their calendars. But when I view the event in my calendar (Outlook 2007) I want to see everyone who will be attending.

How can I do that?

I just started experimenting with this, I used Outlook's Save As to create an iCal file for a single event. That works, I can link to that file and other people can add the event to their calendars. But it doesn't tell me who has added it.

Here is the (Outlook-generated) code:

BEGIN:VCALENDAR

PRODID:-//Microsoft Corporation//Outlook 12.0 MIMEDIR//EN VERSION:2.0 METHOD:PUBLISH X-MS-OLK-FORCEINSPECTOROPEN:TRUE BEGIN:VEVENT CLASS:PUBLIC CREATED:20100413T175736Z DESCRIPTION:I want to see if the attendee list is updated when someone adds this event.\n DTEND:20100421T153000Z DTSTAMP:20100413T175736Z DTSTART:20100421T150000Z LAST-MODIFIED:20100413T175736Z LOCATION:Wherever PRIORITY:5 SEQUENCE:0 SUMMARY;LANGUAGE=en-us:Totally fake event TRANSP:OPAQUE UID:040000008200E00074C5B7101A82E00800000000604A0119F8DACA01000000000000000 0100000004D19467F69BF6041A0B0FAFFECA1864B X-ALT-DESC;FMTTYPE=text/html:\n\n\n\n\n\n\n\n\nI want to see if the attendee list is updated when someone adds this e vent.

\n\n\n X-MICROSOFT-CDO-BUSYSTATUS:BUSY X-MICROSOFT-CDO-IMPORTANCE:1 X-MICROSOFT-DISALLOW-COUNTER:FALSE X-MS-OLK-ALLOWEXTERNCHECK:TRUE X-MS-OLK-AUTOFILLLOCATION:FALSE X-MS-OLK-CONFTYPE:0 BEGIN:VALARM TRIGGER:-PT15M ACTION:DISPLAY DESCRIPTION:Reminder END:VALARM END:VEVENT END:VCALENDAR