US-based technology giant Microsoft on Friday, November 13, admitted that its fixes are not “working as expected,” as a mega outage hit millions of users across Microsoft 365 services globally.
While posting on their official social X handle, Microsoft said it had monitored the status of the changes applied to improve serviceability and confirmed they were not taking effect as expected.
We’re continuing our efforts to improve server stability to improve traffic flow. This includes adjusting traffic protocols, redistributing traffic, and applying strategic traffic blocking measures. We’re observing partial recovery across regions in which we’ve applied these adjustments; however, these actions aren’t resulting in sustained recovery, so we’re reviewing what additional actions we can take to improve overall infrastructure stability. More info under EX1550543 and MO1550821 in the Microsoft 365 admin center, as well as https://t.co/pYdahqxDv3 if the admin center is not available to you.
— Microsoft 365 Status (@MSFT365Status) November 13, 2026
The US tech giant, while posting on X, wrote, “We’re identifying alternate workstreams that can be applied to increase capacity in the face of sustained traffic management imbalances.”
Multiple Microsoft 365 services facing issues
According to Microsoft, users may be unable to connect to multiple Microsoft 365 services with features interacting with Exchange Online and email services impacted.
Exchange Online users may be unable to access their mailbox using Outlook on the web, Outlook desktop, Exchange ActiveSync or REST-based connections, and email delivery may be delayed, according to the company.
The Microsoft 365 admin center pages also may fail to load, while Microsoft 365 app users may be unable to view recently used files.
Similarly, Microsoft Copilot 365 users may be unable to load Copilot Chat or receive responses, and Copilot experiences may be unable to access work data such as email, calendar, and files.
MS Teams’ calling, meeting, and channel messages, working uninterruptedly
Microsoft Teams’ core functionality, including joining calls, meetings, group chats, and channel messages, was largely not impacted, the company said.
Microsoft also added, “But calendar-related failures, creation of Live or Virtual events, Copilot responses, and contact syncing were affected.”
Other impacted services include Microsoft Defender for Office 365 and Defender XDR, Microsoft Fabric, Microsoft Graph, Microsoft Intune, Microsoft Planner, Microsoft Purview, Microsoft To Do, Power BI, SharePoint Online, Universal Print, and Windows 365.
“As part of our investigation into the sustained traffic management imbalances, we’re reviewing traffic flows and affected infrastructure to identify opportunities to optimise routing. This includes verifying the reasons for service failures so we can develop specific actions to improve stability,” Microsoft said in its status update.
(With inputs from IANS)
