Outdated client ID error after upgrading to the December 2016 update for Dynamics 365

Vrijedi za: Dynamics CRM


After your organization is upgraded to the December 2016 update for Dynamics 365, existing mailbox records may quit synchronizing and the following alert is logged:

"Mailbox <Mailbox Name> didn't synchronize because the user has an outdated client ID. We have reset the information for you.

Email Server Error Code: Crm:80044113."

If you click Details, the details section includes text like the following:

"subscriptionclients with clientid <GUID> doesn't exist"


Microsoft has identified an issue that can cause this symptom and plans to release a fix.  In the meantime, follow the steps in the Resolution section to enable the mailboxes.


  1. Sign into Dynamics 365 as a user with the System Administrator role.
  2. Navigate to Settings and then click Email Configuration.
  3. Click Mailboxes.
  4. Change the view to Active Mailboxes.
  5. Select the mailbox record(s) and then click Test & Enable Mailboxes.