Microsoft was still working to bring email and other Microsoft 365 services back online on Nov. 13, with some users unable to connect to the apps they use for work.
In its 8:08 a.m. advisory, Philippine time, Microsoft named Exchange Online, Teams, SharePoint Online, and Copilot among the services that could be affected. The problems also extended to tools for printing, protecting data, and managing work computers.
“While the servers we’ve returned to service initially remain healthy, we’ve observed that they can become unresponsive again once they begin receiving traffic,” Microsoft said.
Some servers started working after repairs but stopped responding again when connections resumed. Microsoft’s teams were checking data from these servers to understand why the problem kept happening.
The company was temporarily limiting the types of requests reaching affected systems in some locations. This would help it find out whether certain requests were causing problems and bring services back gradually.
Microsoft was also rebuilding some servers with an earlier software setup to see whether they would keep working. It said it would try the same approach on more servers if the tests worked.
An earlier update showed some improvement in certain regions after Microsoft moved connections to other routes. The company said access could return gradually as more servers became available and users’ apps reconnected.
Other services also faced problems. Some Power BI users could have trouble saving certain reports as PDF files. Universal Print users could run into errors when sending documents to print or managing the service.
Some Windows 365 users could also have trouble opening their cloud computers. This affected customers using a particular Microsoft Purview setup to protect their data.
Microsoft had not announced a full recovery in the advisory. It scheduled its next update for 9:30 a.m., Philippine time, on Nov. 13.