Is Outlook Down? Microsoft 365 Outage, Nov 12, 2026
Yes. On Thursday, November 12, 2026, Outlook stopped loading mail for a large share of Microsoft 365 users. Microsoft confirmed that people “may be unable to connect to their mailboxes in Exchange Online through multiple connection methods,” first in the Americas and then possibly in any region. It’s tracked as incident EX1550543 in the Microsoft 365 admin center. If your inbox won’t load, it’s almost certainly not your laptop, your password or your Wi-Fi.
Last updated: Thursday, November 12, 2026, 2:00 p.m. ET. As of this update, Microsoft had not announced a cause or a time for full recovery.
What’s down
Exchange Online, the service behind work and school Outlook mailboxes, is the part Microsoft has confirmed. Its status page lists Exchange Online as a “service degradation,” according to Windows Forum, which also logged the incident’s first timestamp at 17:46 UTC (12:46 p.m. ET).
“Multiple connection methods” matters. It means Outlook on the web, the desktop app and the phone app can all fail at once, so switching apps is unlikely to get you in.
Users also reported trouble with Teams, Copilot, OneDrive and the Microsoft Store on Downdetector. Those reports are user-submitted, and Microsoft hasn’t confirmed an outage for each of them. Microsoft did track a separate Teams problem in North America earlier the same day (incident TM1550488) and said its automated recovery systems restored that one. It hasn’t said whether the two incidents are connected, per Click2Houston.
Timeline of the November 12 outage
All times Eastern.
- 12:46 p.m. EX1550543 appears on Microsoft 365 service health: “Users may be unable to connect to their mailboxes in Exchange Online through multiple connection methods.”
- 12:50 p.m. Downdetector shows about 2,400 Outlook reports, while Microsoft’s public status checker still lists every product as operational.
- 12:58 p.m. Downdetector passes 13,000 Outlook reports. Microsoft’s own status checker briefly becomes unavailable, per GV Wire’s running count summarized by Windows Forum.
- 1:08 p.m. The @MSFT365Status account on X publicly acknowledges it is investigating mailbox access problems in the Americas. Reports pass 65,000.
- 1:27 p.m. Downdetector records more than 130,000 Outlook reports, more than 46,000 for Microsoft 365 and about 3,000 for Teams, per a report on the US numbers.
- Afternoon. Microsoft widens the scope: “we’ve confirmed the issue may affect Microsoft 365 service connectivity for users in any region.” It also says it has “collected networking logs to further investigate the source of these errors and confirm our next steps,” reports The National.
Downdetector counts are complaints, not a measure of how many people were actually affected. They tell you the outage is big, not exactly how big.
How to check whether Outlook is back
- Microsoft’s public status page: status.cloud.microsoft. It’s the official page, though during this outage it still showed every product as operational while user reports were already climbing.
- @MSFT365Status on X: usually the fastest place Microsoft posts updates during an incident.
- If you’re an IT admin: open the Microsoft 365 admin center, go to Health > Service health and look up EX1550543. The “Scope of impact” field says whether your tenant is affected, and you can subscribe to email updates on the incident.
What to do while Outlook is down
Don’t reset your password or remove and re-add your account. Microsoft describes this as a service-side problem. Resetting credentials won’t fix it, and re-adding an account means a full re-sync later, often while everyone else is doing the same thing.
Use what’s already on your computer. Desktop Outlook keeps a local copy of recent mail in most setups (Cached Exchange Mode), so you can usually still read and search messages that downloaded before the outage. Anything you send sits in your Outbox and goes out once Outlook reconnects. If something is urgent, check the Outbox afterward instead of assuming it left.
Write drafts, not sends. For anything time-sensitive, draft it in Outlook or a document and send it once the service is back, or send it from another channel.
Move urgent conversations to the phone. Call or text the people who are waiting on you. If you have a personal email account, use it for anything that can’t wait, and tell the recipient why the message is coming from a different address.
Check your calendar another way. Your Outlook calendar lives in Exchange too, so it may not load. A meeting invite forwarded to a personal account, a Teams meeting link in a chat, or the calendar widget on your phone (which often shows a cached copy) can get you to your next call.
Will I lose any email?
Microsoft has described this as a mailbox access problem, not a mail delivery problem, and it hasn’t said that any messages were lost. When a receiving mail server can’t accept messages, sending servers normally hold them and keep retrying, often for days, before bouncing them back. The practical risk is delay, not loss. If a message you sent bounces back later today, resend it.
Expect a burst when access returns: hours of mail arriving at once, plus everyone replying to the “did you get my email?” messages they sent during the outage.
Has this happened before?
Yes, and often enough that it’s worth having a plan. Microsoft 365 had a large Outlook outage as recently as January 22, 2026. Microsoft hasn’t linked today’s incident to any earlier one.
Sorting the backlog when Outlook comes back
Carly is an AI assistant that works inside your Outlook (and Gmail) inbox, and it runs through your Outlook connection, so it picks up the moment Microsoft does. That’s when it earns its keep: when a few hours of mail land at once, Carly labels and sorts all of it by the rules you’ve set, so the client emails and meeting changes are on top and the newsletters and notifications are out of the way.
It also gives you somewhere to work during the next outage. If you connect a Gmail account alongside Outlook, Carly keeps working on that one, and you can text Carly from your phone, which doesn’t depend on Exchange at all. Carly offers free Zapier-style workflows, with AI agents from $35/month. See how it compares in the best AI assistants for Outlook and the best AI assistants that work with Gmail and Outlook.
FAQ
Is Outlook down right now? On November 12, 2026, yes. Microsoft confirmed users may be unable to reach their Exchange Online mailboxes through multiple connection methods, tracked as EX1550543. Check status.cloud.microsoft or @MSFT365Status for the current state.
Is it just me? Almost certainly not. Downdetector’s Outlook count went from about 2,400 reports to more than 130,000 in under 40 minutes, and Microsoft acknowledged the problem publicly.
Is Teams down too? Microsoft tracked a separate Teams incident in North America earlier on November 12 (TM1550488) and said automated recovery restored it. Users reported Teams problems during the Outlook outage, but Microsoft’s confirmed incident for the afternoon is Exchange Online.
What caused the Microsoft outage? Microsoft hasn’t said. Its latest update said it had collected networking logs to investigate the source of the errors.
Is personal Outlook.com affected too? Microsoft’s confirmed incident covers Exchange Online, which runs work and school mailboxes. It hasn’t announced a separate incident for personal Outlook.com accounts.
Should I reset my password? No. This is a problem on Microsoft’s side, and a reset won’t bring your mailbox back.
When will Outlook be back up? Microsoft hasn’t given an estimate. Watch status.cloud.microsoft and @MSFT365Status, and admins can subscribe to updates on EX1550543 in the admin center.
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