About Creating, Modifying, or Deleting an Appointment
You can add a new appointment, change an existing appointment, or remove an appointment in either Siebel Business Applications or Microsoft Outlook. Synchronization is automatic except in the instances described in Factors That Determine Calendar Synchronization.
In the specific case where the Owner adds or removes a contact attendee from an appointment in Siebel Business Applications, the change is synchronized with the participant lists of the corresponding Microsoft Exchange calendar items for all sync-enabled participants.
Note: If an Owner removes a participant from a recurring appointment
in Microsoft Exchange, then the change is not synchronized with Siebel
Business Applications, but neither does the older Siebel data overwrite
the change in Microsoft Exchange. If the Owner changes appointment
header information (such as Start Date, End Date, and Description)
in Exchange, then these header changes are synchronized with Siebel
Business Applications.