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InvalidOutgoingMailboxEmailAddress error appears in Microsoft Dynamics 365 mailbox alert

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This article provides a resolution for the InvalidOutgoingMailboxEmailAddress error that occurs in Microsoft Dynamics 365 mailbox alert.

Applies to:   Microsoft Dynamics 365 Customer Engagement Online
Original KB number:   4500801

Symptoms

When you select Test & Enable Mailbox on a mailbox record in Microsoft Dynamics 365, the test results are not success. Additionally one of the following alerts appears within the Alerts section of the mailbox:

  • Email can't be sent for the mailbox [Mailbox Name] because the mailbox record doesn't have a valid email address. The mailbox didn't synchronize. A notification about this is posted on the alerts wall for the owner of the email server profile Microsoft Exchange Online.

    Email Server Error Code: InvalidOutgoingMailboxEmailAddress

  • Email can't be received for the mailbox [Mailbox Name] because the mailbox record doesn't have a valid email address. The mailbox didn't synchronize. A notification about this is posted on the alerts wall for the owner of the email server profile Microsoft Exchange Online.

    Email Server Error Code: InvalidIncomingMailboxEmailAddress

Cause

This error occurs if there is not a valid email address in the Email Address field of the mailbox record.

Resolution

To fix this issue, follow these steps:

  1. Correct the value in the Email Address field and then select Save.
  2. Select the Test & Enable Mailbox button again.
  3. If the test results are not success, view the message and help link in the Alerts tab.