Microsoft has confirmed that some of the Microsoft 365 services are currently down again. The company confirmed this via its official Microsoft 365 Status X handle as it notes that the Office.com portal and some of its related services like online mailbox are inaccessible at the moment due to Exchange Online ser. The tech giant has informed that you can get status updates regarding the progress of the bug on the Microsoft 365 Admin Center portal with issue ID "EX1253275" so details regarding the outage will be shared there.
We"re investigating reports of some users experiencing issues when accessing their Exchange Online mailbox via one or more connection methods. More information may be found in the Microsoft 365 admin center under EX1253275.
— Microsoft 365 Status (@MSFT365Status) March 16, 2026
The official Microsoft 365 Service Health Status website never registered an issue.
We will update the post once more details are available.
Update, March 17 2025, 5.00 GMT: Microsoft earlier posted a couple of updates, stating that it managed to resolve the problems by identifying the core issue:
We’re monitoring to identify whether any additional actions are required for full recovery. Our telemetry continues to indicate the issue is no longer occurring for affected users. More information may be found in the Microsoft 365 admin center under EX1253275.
— Microsoft 365 Status (@MSFT365Status) March 16, 2026
We identified and resolved an underlying issue involving the supporting network infrastructure that resulted in service degradation. After a period of monitoring, we can confirm that the service is healthy. More information may be found in the Microsoft 365 admin center under…
— Microsoft 365 Status (@MSFT365Status) March 16, 2026