Final status: We completed the roll back of a recent update which has mitigated the issue, and our service telemetry indicates recovery and restoration of mail flow. Additionally, the service has automatically rebalanced traffic across healthy infrastructure to further expedite resolution for end-users.

Root cause: We identified that a recent update made to the impacted Canadian infrastructure may have contributed to end-user impact. The update was intended to improve aspects of mail routing across our Canadian infrastructure.

Next steps:

- We're reviewing our service update procedure to better identify areas of improvement for handling service changes like this one in the future.

- We're reviewing our detection mechanisms to identify any areas of improvement for responding to issues similar to this one in the future.

We’ll provide a Post-Incident Report within 5 business days.

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​SD5 IT Advisory Notice: Intermittent Email - Outlook/Exchange Online message delivery delayed (inbound/outbound)
Hello Everyone (SD5 All Staff/Students);
There has been an ongoing problem this morning regarding email services (outlook/Exchange online),  Microsoft is investigating the issue, here is the latest update regarding the problem, we'll continue to monitor for updates.
 
Some users' inbound and outbound email messages may be intermittently delayed when sending through Exchange Online
 
Issue ID: EX779388
Affected services: Exchange Online
Status: Investigating
Issue type: Incident
Start time: Apr 17, 2024, 9:13 AM MDT
 
User impact
Users' inbound and outbound email messages may be intermittently delayed when sending through Exchange Online.
 
Description
Some users report that they can't send or receive messages at all.
This issue occurs in all Exchange Online connection methods.
 
Scope of impact
This issue can potentially affect any user that's hosted in Canada that's attempting to send or receive email messages, as well as users who are hosted outside of Canada that attempt to send email to or receive email from users hosted in Canada.
 
 
Current status
Apr 17, 2024, 11:04 AM MDT
We're continuing our analyses into portions of mail flow infrastructure that's performing below our manageable service performance thresholds. We've isolated and are further analyzing an error related to a processing quota so we can determine our next troubleshooting steps for remediating the impact.
Next update by:
Apr 17, 2024, 1:30 PM MDT
 
History of updates
Apr 17, 2024, 9:52 AM MDT
Our monitoring systems show that portions of mail flow infrastructure are operating below expected standards, resulting in either mail flow delays or outright failures to send or receive email messages. We're evaluating the service infrastructure to determine the most expedient remediation option while also determining the reasoning behind this service degradation.
Apr 17, 2024, 9:19 AM MDT
We're investigating a potential issue where some users' inbound and outbound email messages may be delayed, and we’re checking for impact to your organization. We'll provide an update within 30 minutes.