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This article helps you resolve error messages logged in a Microsoft Dynamics 365 mailbox record during server-side synchronization.
Applies to: Microsoft Dynamics 365
Original KB number: 4477141, 4471977, 4471949, 4471948
Symptoms
One of the following alerts is logged in the Alerts section of a Dynamics 365 mailbox record:
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An error occurred while synchronizing the item <Item Name> from Microsoft Dynamics 365 for the mailbox <Mailbox Name>.
Email Server Error Code: Crm.80040216. An unexpected error occurred.
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An error occurred in receiving email for the mailbox <Mailbox Name> while connecting to the email server. The owner of the associated email server profile <Profile Name> has been notified. The system will try to receive email again later.
Email Server Error Code: Http server returned ServiceUnavailable exception
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An internal Microsoft Dynamics 365 error occurred while receiving email through the mailbox <Mailbox Name>. The owner of the associated email server profile <Profile Name> has been notified. The system will try to receive email again later.
Email Server Error Code: IncomingMailboxInternalCrmError
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An unexpected error occurred while receiving email. Mailbox <Mailbox Name> didn't synchronize. The owner of the associated email server profile <Profile Name> has been notified.
Email Server Error Code: ErrorInternalServerTransientError
Cause
The error messages might occur when server-side synchronization tries to synchronize an item with Microsoft Exchange but encounters issues such as internal errors or a 503 (Service Unavailable) error. Typically, these are temporary problems, and synchronization usually succeeds in the next cycle (approximately every 15 minutes).
Resolution
- If the issue doesn't persist during the next synchronization cycle (typically in 15 minutes), you can ignore it.
- If the issue persists and the mentioned item isn't being synchronized by server-side synchronization, you can contact Microsoft Support through the Help + Support experience in the Power Platform admin center.
- Additionally, there might be an issue with your email server, so you can first verify that you can send and receive emails successfully with your email service.