Outlook & Exchange compatability

X-properties

The following will describe the microsoft x-properties we know about. The Required tag is yes if the property is required for correct working with exchange and outlook.

X-MICROSOFT-CDO-ALLDAYEVENT

Appears to take a TRUE/FALSE value

X-MICROSOFT-CDO-ALLDAYEVENT:FALSE

Required: ?

X-MICROSOFT-CDO-APPT-SEQUENCE

Required: ?

X-MICROSOFT-CDO-ATTENDEE-CRITICAL-CHANGE

Appears to be set to the time the attendee made a change.

X-MICROSOFT-CDO-ATTENDEE-CRITICAL-CHANGE:20081212T174513Z

Required: ?

X-MICROSOFT-CDO-BUSYSTATUS

Required: ?

X-MICROSOFT-CDO-IMPORTANCE

Required: ?

X-MICROSOFT-CDO-INSTTYPE

Required: ?

X-MICROSOFT-CDO-INTENDEDSTATUS

Required: ?

X-MICROSOFT-CDO-MODPROPS

Specify a list of properties considered valid in a specific record. Other properties are ignored by Exchange.

X-MICROSOFT-CDO-MODPROPS:BEGIN,SUMMARY,DTSTART,DTEND,END

Required: ?

X-MICROSOFT-CDO-OWNER-CRITICAL-CHANGE

Appears to be set to the time the organizer made a change. Same value as DTSTAMP?

X-MICROSOFT-CDO-OWNER-CRITICAL-CHANGE:20081125T200509Z

Required: ?

X-MICROSOFT-CDO-OWNERAPPTID

Required: ?

X-MICROSOFT-CDO-REPLYTIME

X-MICROSOFT-CDO-REPLYTIME:20081201T163100Z

Required: ?

X-MICROSOFT-CDO-TZID

X-MICROSOFT-CDO-TZID:10

Required: ?

X-properties example event

BEGIN:VCALENDAR
METHOD:REQUEST
PRODID:Microsoft CDO for Microsoft Exchange
VERSION:2.0
BEGIN:VTIMEZONE
TZID:(GMT-05.00) Eastern Time (US & Canada)
X-MICROSOFT-CDO-TZID:10
BEGIN:STANDARD
DTSTART:16010101T020000
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
RRULE:FREQ=YEARLY;WKST=MO;INTERVAL=1;BYMONTH=11;BYDAY=1SU
END:STANDARD
BEGIN:DAYLIGHT
DTSTART:16010101T020000
TZOFFSETFROM:-0500
TZOFFSETTO:-0400
RRULE:FREQ=YEARLY;WKST=MO;INTERVAL=1;BYMONTH=3;BYDAY=2SU
END:DAYLIGHT
END:VTIMEZONE
BEGIN:VEVENT
DTSTAMP:20081125T200509Z
DTSTART;TZID="(GMT-05.00) Eastern Time (US & Canada)":20090210T170000
SUMMARY:This is the summary
UID:1234567890a-uid
ATTENDEE;ROLE=REQ-PARTICIPANT;PARTSTAT=NEEDS-ACTION;RSVP=TRUE;CN="acalendar
 user@somewhere.org":MAILTO:acalendaruser@somewhere.org
ORGANIZER;CN="Another uuser":MAILTO:anotheruser@somewhere.org
LOCATION:Somewhere
DTEND;TZID="(GMT-05.00) Eastern Time (US & Canada)":20090210T190000
DESCRIPTION:A description
SEQUENCE:1
PRIORITY:5
CLASS:Company-Confidential
CREATED:20081212T200509Z
LAST-MODIFIED:20081212T200509Z
STATUS:CONFIRMED
TRANSP:OPAQUE
X-MICROSOFT-CDO-BUSYSTATUS:OOF
X-MICROSOFT-CDO-INSTTYPE:0
X-MICROSOFT-CDO-REPLYTIME:20081201T163100Z
X-MICROSOFT-CDO-INTENDEDSTATUS:OOF
X-MICROSOFT-CDO-ALLDAYEVENT:FALSE
X-MICROSOFT-CDO-IMPORTANCE:1
X-MICROSOFT-CDO-OWNERAPPTID:-1986226216
X-MICROSOFT-CDO-APPT-SEQUENCE:1
X-MICROSOFT-CDO-ATTENDEE-CRITICAL-CHANGE:20081212T174513Z
X-MICROSOFT-CDO-OWNER-CRITICAL-CHANGE:20081125T200509Z
BEGIN:VALARM
ACTION:DISPLAY
DESCRIPTION:REMINDER
TRIGGER;RELATED=START:-P3DT00H00M00S
END:VALARM
END:VEVENT
END:VCALENDAR