A number of updates were posted by MIcrosoft across the night, with the start of service recovery of exchange being seen around 03:30 GMT.

All queued emails have been sent in US and CA regions, and the service is fully operational.

Microsoft have reported service degradation to multiple Microsoft 365 components, with customers receiving a "451 4.3.2 temporary server issue" error message when attempting to send or receive email through Outlook.

More information is available from Microsoft's cloud status pages at https://status.cloud.microsoft/

We are still experiencing server-side email delays due to these issues, however please rest assured that email routed through server-side injection will be delivered to the recipients when Microsoft's services recover.

We are currently seeing server-side email delivery delays due to a Microsoft 365 outage, as confirmed by Microsoft at 7:37 PM on X: https://x.com/msft365status/status/2014422298506285161:

"We’re investigating a potential issue impacting multiple Microsoft 365 services, including Outlook, Microsoft Defender, and Microsoft Purview. Further information can be found in the admin center under MO1221364."

The issue is fully resolved. We’re sorry for any delays in processing your email, or any errors you experienced using our Outlook Add-In. Please reach out to support@symprex.com
for any questions.

We’ve determined that our database cluster experienced a lack of availability after an underlying VM upgrade. We have restored the database availability and service has been restored. We are working through a backlog of server-side emails, with new emails potentially experiencing a short delay in delivery time.

We are currently experiencing delays in signature generation and email delivery due to a database issue. Our team is working to identify the root cause and fix the issue. Users may be experiencing slow to update signatures in Outlook or delayed server-side emailos. Please reach out to support@symprex.com
for any questions.