Microsoft 365 Fails, and the AI Assistant Goes Down With the Email

Most shipping offices run on Microsoft: Outlook for email, Teams for calls, SharePoint for files. Many have now added Copilot, Microsoft's AI assistant, on top. This week all of it stopped together.

What happened. Around midday on 12 November in New York, which was the early hours of Friday in Manila, a failure in Exchange Online, Microsoft's email service, spread across 20 listed services. People could not open mailboxes in the browser, the desktop program or on phones, and some email arrived late. Teams calendars, Copilot, file sharing with people outside the company, device management and the email security filters that check links and attachments were all hit. Microsoft's cloud computing service Azure was not affected. On 13 November Microsoft reported progress, but also warned that servers it had restored could stop again once traffic came back. Users were still reporting problems.

Was shipping hit? Digital Ship found no shipping company that had reported damage when it published. But it makes the right point: many ship managers' shore offices depend on exactly these services, and many have put their AI assistant in the same Microsoft account as their email.

Why that matters. Two weeks ago we wrote about a bank that runs AI on its own computers. This is the other side. If your email, your calendar, your files and your AI all sit with one supplier, they fail on the same day. And a ship that needs an answer from the office at that moment does not care why.

The security detail. The filters that check links and attachments were also down. During an outage, people move to private email and messaging apps to keep working. That is when a false payment instruction gets through.

What to do this week. Check that every ship has a second way to reach the office that does not use Microsoft: a phone number, a satellite phone, a second email service. Keep a printed list of emergency contacts on board and in the office. Write down which of your AI tools stop when Microsoft stops. And agree one rule for outage days: any change to bank details or cargo release is confirmed by phone to a known number. [Digital Ship · AiatSea, 8 November]

This story is part of the Maritime AI Digest of 15 November 2026.