2.2.102 [RFC5546] Section 2.1.4 Component Revisions

C0024:

The specification describes when the SEQUENCE property MUST and MUST NOT be incremented.

Microsoft Office Outlook 2007, Microsoft Outlook 2010, Microsoft Outlook 2013, Microsoft Outlook 2016, Microsoft Outlook 2019

Outlook's handling of the SEQUENCE property is specified in section 2.2.95.

V0237:

The specification states that in some circumstances the organizer may not have received responses to the final revision sent out. In this situation, the organizer may wish to send an update REQUEST and set RSVP=TRUE for all attendees, so that current responses can be collected.

Office Outlook 2007, Outlook 2010, Outlook 2013, Outlook 2016, Outlook 2019

Outlook permits the organizer to resend a meeting request to all attendees even if no significant changes have been made. Outlook allows attendees to respond to the latest update of a meeting request even if no significant changes have been made.

V0238:

The specification states that the value of the SEQUENCE property contained in a response from an attendee may not always match the organizer's revision. Implementations may choose to have the calendar user agent indicate to the user that the response is to an entry that has been revised and allow the user to decide whether or not to accept the response.

Office Outlook 2007, Outlook 2010, Outlook 2013, Outlook 2016, Outlook 2019

Outlook automatically updates an attendee's copy of a meeting when a meeting update is received. The user is allowed to open and decline the meeting at any time.