A Microsoft 365 outage is preventing Exchange Online users from sending and receiving emails, with messages being stuck in transit and not reaching the recipients' inboxes. "We're investigating a ...

After widespread complaints of blocked or sluggish email services, company says it has identified the problem and the ‘issue is resolved.’ Microsoft said Monday an outage that hit its Exchange Online ...

Microsoft is investigating an ongoing outage blocking Exchange Online customers worldwide from accessing their mailboxes or sending/receiving emails. Affected users see "550 5.4.1 Recipient address ...

Microsoft first tweeted at 8:56 a.m. Pacific Wednesday about the issue. The company said it was resolved hours later. Some users of Microsoft Exchange Online are unable to access mailboxes through any ...

Microsoft was not releasing feature updates for Exchange Web Services in Exchange Online and now says it will block EWS requests from non-Microsoft apps to Exchange Online starting Oct. 1, 2026.

Microsoft Corp. struck a deal with San Francisco officials to provide an online e-mail system for the city's workforce, beating out competing products from Google Inc. and IBM Corp. Company and city ...