Troubleshooting Server-Side Synchronization
This article describes how to troubleshooting Server-Side Synchronization.
Applies to: Microsoft Dynamics 365
Original KB number: 4345669
Configuration and general troubleshooting
Open the mailbox record and select the Alerts section.
Look for any errors and review the message that is displayed.
If no errors appear, navigate to Settings, Email Configuration, and then Email Configuration Settings. In the Configure alerts section, verify the Error option is selected. If this was not already selected, enable this option and select OK. Then select the Test & Enable Mailbox button again and check for any errors. When performing the Test & Enable action, also make sure to select the checkbox that appears in the dialog.
Select the Learn more link if it appears. If there's an article designed to help with that specific error, this link will direct you to it.
Why does the email message I sent have a "Pending Send" status?
If you're using Exchange Online and are attempting to send a large number of emails, you may be hitting Exchange Online limits. Gmail also has sending limits.
"You cannot send email as the selected user" error occurs when attempting to send email as another user