More than 15,000 Microsoft 365 users weren't able to use basic functions Jan. 22 after the company suffered problems.

Microsoft has released a second emergency, out-of-band update for Windows 11, this time to address crashes and instability affecting Outlook following the company’s January 2026 security updates.

Several thousand users reported problems with Outlook on Thursday morning, as Microsoft acknowledged that users might have issues accessing their mailbox. More than 2,700 users were reporting problems ...

Microsoft is working to resolve an Exchange Online issue causing email access problems for Outlook mobile users who use Hybrid Modern Authentication (HMA). HMA is a Microsoft Exchange Server feature ...

Microsoft has acknowledged a new issue affecting Outlook for Microsoft 365 users and causing email-sending problems for those with too many nested folders. According to Redmond, this is likely related ...