The Microsoft 365 Outage and How Few Companies Really Run the Internet

I’ll be honest. A global Microsoft 365 outage was not on my late-2026 bingo card. But here we are.

On November 12, people around the world lost access to Outlook, Teams, SharePoint, OneDrive, Copilot and other Microsoft cloud services. Outage-tracking site Downdetector logged a peak of roughly 130,000 reports. Microsoft said part of its infrastructure was under heavy load and a large number of servers went unexpectedly unavailable. It paused updates, moved traffic to healthy systems, and started bringing servers back up.

Nobody was attacked, as far as we know, and nothing exploded. Some computers somewhere had a bad day. And millions of people couldn’t send an email, join a meeting, or open a file.

The ripple effects

Here’s what people tend to miss. When a service like this goes down, it isn’t just “email is slow.” So many businesses, schools, clinics, and local governments run their whole day through these tools that one failure spreads fast:

• Offices can’t email customers, suppliers, or each other.
• Meetings, telehealth visits, and online classes held on Teams just don’t happen.
• Files stored only in the cloud can’t be opened, including schedules, contracts, and contact lists.
• Sign-in systems that run through the same accounts can lock people out of other tools too.
• Help desks get swamped, and the phone lines back up because everyone falls back to calling at once.

This keeps happening

If this feels familiar, it should. In July 2024, a faulty CrowdStrike software update crashed Windows computers around the world, grounding flights and disrupting hospitals and banks. In October 2025, a problem in a single Amazon Web Services region took down a long list of apps and websites that most people never knew ran on Amazon. A few weeks later, a Cloudflare failure knocked a big chunk of the web offline for hours.

Different companies, different causes. Same lesson every time.

A handful of companies hold it all up

The modern internet looks like millions of separate websites and apps. Underneath, a surprisingly small number of companies carry most of the load:

• Cloud hosting: Amazon, Microsoft, and Google run the servers behind a huge share of the apps you use.
• Work and school: Microsoft 365 and Google Workspace handle email, documents, and meetings for most organizations.
• Traffic and security: companies like Cloudflare sit in front of a large part of the web.
• Your phone: almost every smartphone runs on Apple or Google software, and your photos, contacts, and backups usually live in their clouds.

That setup is cheap and convenient, and most days it works great. But it means a problem at one company isn’t one company’s problem. It’s everybody’s. I talked about the same idea at home in our episode on smart home convenience that breaks self-reliance, which you can find on the Episodes page.

What you can actually do about it

You can’t fix the internet. You can make sure a bad day for a tech company isn’t a bad day for your family or your business. None of this is expensive:

• Keep the numbers that matter on paper: family, work, your kids’ school, your doctor, and your pharmacy. Your contacts live in the cloud.
• Keep local copies of your important files, like insurance policies, IDs, medical info, and your emergency plan, on a USB drive or printed in a folder.
• Have a second way to reach people. If your team only uses Teams, agree ahead of time on a backup, like a group text or a phone tree.
• Don’t put everything under one account. If one sign-in controls your email, files, photos, and passwords, think about spreading it out.
• Keep a little cash at home. Card readers and payment apps depend on these same systems.
• If you run a small business, write down how you’d get through one day without email. Even a single page is better than figuring it out in the moment.

Common sense, not panic

I’m not telling you to throw your phone in the lake. I use these tools every day, and so do you. The point is to notice how much of your life rests on a few companies you don’t control, and to keep a simple backup for the things that really matter.

Outages like this one are a gift, honestly. They’re a low-stakes drill. Next time something breaks, it might last longer or hit at a worse moment. Use this one to find your weak spots while it’s just an inconvenience. No fear, no gatekeeping. Just common sense.