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When using Server-Side Synchronization to synchronize appointments between Dynamics 365 and Exchange, an appointment is cancelled or deleted unexpectedly.
This can occur if the organizer of the appointment changes. The default behavior of Dynamics 365 can result in the appointment being deleted in this scenario.
A configurable setting was introduced to allow you to change this behavior. You can use one of the following tools to change the DistinctPhysicalAndLogicalDeletesForExchangeSync setting to True:
Keywords: Dynamics 365, server-side synchronization, appointment, delete