Microsoft 365 Exchange, Outlook down, preliminary details about outage shared

Microsoft 365 Exchange, Outlook down, preliminary details about outage shared [Update]

Microsoft has confirmed that Outlook and related Microsoft 365 services are down and out. The company is investigating.

Outlook logo on a black and red background

Microsoft has confirmed that Microsoft 365 services like Outlook are currently down. The company confirmed this via its official Microsoft 365 Status X handle. As such, users will be unable to access such Outlook features and services. The company has informed that you can get status updates regarding the progress of the bug on the Microsoft 365 Admin Center portal with issue ID "MO1020913".

We're investigating an issue in which users may be unable to access Outlook features and services. Additional details can be found under MO1020913 in the admin center.
— Microsoft 365 Status (@MSFT365Status) March 1, 2025

The official Microsoft 365 Service Health Status website currently lists there is no issue with "everything up and running". However, the page will likely be updated soon to reflect the situation.

From the user comments on the M365 Status X thread, it appears that the Microsoft 365 Admin Center portal is also inaccessible.

We will update the post once more details are available.

Update, March 1, 9.45pm PST: Since our initial report the Microsoft 365 official X handle provided continuous updates on the situation. The was quickly resolved after Microsoft was able to identify the "problematic code".

We’re reviewing available telemetry and customer provided logs to understand the impact. We’ve confirmed this issue is impacting various Microsoft 365 services. Refer to MO1020913 for more detailed information.
— Microsoft 365 Status (@MSFT365Status) March 1, 2025

We've identified a potential cause of impact and have reverted the suspected code to alleviate impact. We’re monitoring telemetry to confirm recovery. Refer to MO1020913 for more detailed information.
— Microsoft 365 Status (@MSFT365Status) March 1, 2025

Our telemetry indicates that a majority of impacted services are recovering following our change. We’ll keep monitoring until impact has been resolved for all services. Refer to MO1020913 or https://t.co/vB5FHDUOHj for more detailed information.
— Microsoft 365 Status (@MSFT365Status) March 1, 2025

Following our reversion of the problematic code change, we’ve monitored service telemetry and worked with previously impacted users to confirm that service is restored. Please refer to MO1020913 in the admin center for detailed information.
— Microsoft 365 Status (@MSFT365Status) March 2, 2025