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A scheduling conflict was found when saving appointment from Exchange to Microsoft Dynamics 365

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This article provides a resolution for an email server error code "ExchangeSyncSchedulingConflictsError" that occurs when saving an appointment from Exchange to Microsoft Dynamics 365.

Applies to:   Microsoft Dynamics 365
Original KB number:   4340070

Symptoms

The following error message is logged in the Alerts section of a Dynamics 365 mailbox record:

A scheduling conflict was found when saving appointment <appointment subject> from Exchange to Microsoft Dynamics 365 because <user> is unavailable at this time. Do you want to ignore the conflict and save anyway?

Email Server Error Code: ExchangeSyncSchedulingConflictsError

If you view the Server-Side Synchronization Failures dashboard, you might see an appointment in the Appointments, Contacts, and Tasks Failed To Sync section with a Sync Error value of ExchangeSyncSchedulingConflictsError.

Cause

This error is logged if you track an Outlook appointment in Dynamics 365 but server-side synchronization detects a scheduling conflict with another appointment you have at the same time.

Resolution

To fix this issue, follow these steps:

  1. Sign in to the Dynamics 365 web application as a user with the "System Administrator" role.
  2. Navigate to Settings > Email Configuration, and then select Mailboxes.
  3. Open your mailbox record.
  4. Select the Alerts section on the left side of the form.
  5. Locate the alert mentioned in the Symptoms section of this article.
  6. Move your mouse over the alert, and you should see options for Yes or No.
  7. If you want the appointment to be created in Dynamics 365, select Yes.
  8. The next time server-side synchronization processes your mailbox, the appointment should be created in Dynamics 365. This action might take up to 15 minutes.