- Outlook was down for North America users, and maybe other regions too
- Locate session, server connections and shipping/reception mail were affected
- The problem was attributed to the use of “unexpectedly high” CPU
An interruption of the system that affects outlook users in North America, which has now been resolved, caused users to access electronic emails and calendars through any online exchange method.
The problem, tracked as ex1151485 in the administration center, was covered on the Microsoft 365 State X page in a series of publications.
Microsoft declared that the “majority of the previously degraded infrastructure” had been “restored” about 14 hours after the first place came out, but the company decided not to share more details about the interruption.
Outlook just returned online
The interruption began the local schedule on Thursday morning (September 11), with users who observed problems in Outlook, Teams and Hotmail. Some also noticed OneDrive problems, but we are not sure if they are connected.
The login problems and server connection problems were the key problems, but the delays in email delivery also caused headaches for many.
A few hours after publishing its first X update, Microsoft assured users that it was still “continuing to evaluate the telemetry of the service for possible irregularities of the system.”
Downdector Vio Picos in complaints related to Microsoft 365 and Outlook Online, while the company’s public support page reported “degradation of the service in Microsoft consumption products.” For Outlook, most complaints related to login, server connection and sending some comments as well.
Later he applied some “optimizations” that caused “some improvements in the service” before revealing that some users in South America had also been affected by the interruptions.
Since then, the failure has been attributed to the “unexpectedly high use of resources (CPU) that may be contributing to connection errors and failures for the mailboxes housed in this part of the infrastructure”, determined by telemetry and traces records analyzed by Microsoft engineers.
Microsoft continues to monitor the problem for other signs, but for now, the services remain “within the expected thresholds.”
