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Microsoft Investigating Outage Affecting Microsoft 365, Outlook and Other Services
Over 15,000 users reported disruptions across Microsoft 365 services due to a North America infrastructure issue; recovery efforts involve traffic rebalancing, Microsoft said.
- On January 13, 2026, Microsoft acknowledged that Classic Outlook profiles with POP accounts and PST files began hanging after Windows update KB5074109 on Windows 11 25H2 and 24H2 systems.
- Facing PST files on OneDrive, Microsoft warned that apps may become unresponsive, citing `For example, in some configurations of Outlook that store PST files on OneDrive, Outlook might become unresponsive and fail to reopen unless its process is terminated in Task Manager, or the system is restarted`.
- Users reported random hangs, unsaved email progress when Outlook desktop client freezes, sent messages missing in Sent Items folder, and Outlook redownloading messages.
- Microsoft says it is investigating the issue with no timeline for a fix, while users can uninstall KB5074109 or KB5073724 via Settings app > Windows Update > Update history > Uninstall updates, but this may expose devices to security risks.
- Microsoft later said a third-party networking issue caused the January 21, 2026 outage that blocked Microsoft 365, Microsoft Teams and Microsoft Outlook access, after nearly 1500 reports on Down Detector.
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105 Articles
105 Articles
Tallahassee DemocratReposted by 
Sarasota Herald-Tribune
Sarasota Herald-TribuneIs Microsoft still down? What we know this morning
More than 15,000 Microsoft 365 users weren't able to use basic functions Jan. 22 after the company suffered problems.
·Tallahassee, United States
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Coverage Details
Total News Sources105
Leaning Left11Leaning Right8Center56Last UpdatedBias Distribution75% Center
Bias Distribution
- 75% of the sources are Center
75% Center
14%
C 75%
11%
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