November 12th 2026 - Microsoft

Microsoft is currently experiencing an Outage, it appears to be impacting Outlook but to a lesser degree Teams.  

We are still looking at the scope of the outage but it is across Canada.  If there are any steps needed for you to take once the issue is resolved we will reach out.  

Please don't reset any passwords or remove any accounts during the outage. 

Official Notes from Microsoft:

Users may be unable to connect to their mailboxes in Exchange Online through multiple connection methods

Issue ID: EX1550543

Affected services: Exchange Online

Status: Service degradation

Issue type: Incident

Start time: Nov 12, 2026, 11:17 a.m. EST

User impact

Users may be unable to connect to their mailboxes in Exchange Online through multiple connection methods.

More info

Potentially impacted connection methods may include:

- Outlook on the web

- Messaging API (MAPI)

- Exchange ActiveSync (EAS)

- Representational State Transfer (REST) API

Impact to additional Microsoft 365 services is described under MO1550821 in the Service Health Dashboard.

Scope of impact

This issue may affect users attempting to access their mailbox in Exchange Online using the affected connection methods.

Current status

Nov 12, 2026, 2:57 p.m. EST

While we haven't identified any recent changes that correlate with the start of impact, our investigation indicates the failed health checks may originate from a specific component on the affected servers that's responsible for processing them. We're deploying a targeted change to bypass this component on a subset of servers to validate whether this restores availability, and we've taken steps to prevent additional servers from being removed from service while we work to return the affected servers to service. We're also investigating why affected servers are experiencing elevated processor usage while handling requests.

Next update by:

Thursday, November 12, 2026 at 4:00 p.m. EST