Is Microsoft 365 down? On Thursday, November 12, 2026, yes, for many businesses it was. A large Microsoft 365 outage began shortly before 10 a.m. Pacific and disrupted Outlook email, Teams, SharePoint, OneDrive, Copilot, and other Microsoft 365 services for close to a day. Microsoft says the problem started with “an issue during an earlier network capacity upgrade,” that the underlying cause has been addressed, and that it found no sign of malicious activity. As of Friday afternoon, November 13, Microsoft’s public status page still listed Microsoft 365 as degraded while recovery continued, so some users may still see delays or intermittent errors.
If your Los Angeles or Orange County office lost email or Teams yesterday, here is what happened in plain words, how to tell whether a problem is Microsoft’s or your own, what to do while an outage is happening, and how to be ready for the next one.
What Happened During the November 12 Microsoft 365 Outage
Here is the timeline based on what Microsoft and news coverage have reported so far. All times are Pacific.
- Thursday, about 9:30 to 10 a.m.: Connectivity problems began. Network monitoring firm ThousandEyes saw users getting connection resets, timeouts, and server errors when trying to reach Outlook and other Microsoft 365 services.
- Thursday afternoon: Microsoft said a number of servers were unexpectedly unavailable and failing automated health checks, which put heavy load on the rest of its infrastructure across multiple regions. Around 1 p.m., it said it had validated an alternative health-check method that brought some servers back online and began applying it more broadly.
- Thursday night into Friday morning: Outlook problems continued for many users. Microsoft extended the window in which delayed emails keep retrying delivery to 48 hours, so messages sent during the outage are less likely to be lost.
- Friday, around 7:30 a.m.: Microsoft reported “encouraging recovery progress,” with service availability and email delivery improving, while warning that some users may still see intermittent issues.
- Friday: Microsoft apologized for the disruption, according to CNBC, said the cause traced back to a network capacity upgrade, and said it would publish a full report once its review is complete.
At the time of writing (Friday afternoon), the Microsoft service health status page still showed “service degradation” for Microsoft 365, noting that users may be unable to connect to multiple services. If your team is still missing email from Thursday, it may simply be working its way through the backlog.
Is It Microsoft 365 or Just Your Office? How to Tell
When Outlook stops loading, the first question is whether the problem is on Microsoft’s side or yours. A few quick checks usually answer it in under five minutes:
- Check Microsoft’s status page. Go to status.cloud.microsoft. Microsoft points customers there when the admin center itself is not available.
- Check Service health in the Microsoft 365 admin center. If you have admin access, the Service health page shows incidents affecting your specific tenant, often with an incident ID and more detail than the public page. During this outage, Microsoft pointed admins to incident MO1550821.
- Try another device and another network. If Outlook fails on your office computer but works on your phone over cellular data, the issue may be your office internet, firewall, or that one computer.
- Try other websites. If nothing loads, it is probably your internet connection, not Microsoft.
- Ask a coworker or a neighbor business. If one person is affected, it is usually an account or device issue. If everyone in the office is affected but other businesses are fine, look at your network. If everyone everywhere is affected, it is likely Microsoft.
This matters because the fix is different. If it is Microsoft, nothing on your side will bring it back faster, and restarting servers or resetting passwords can create new problems. If it is your network or a single account, your IT support can usually fix it right away.
What to Do During a Microsoft 365 Outage
Switch to a backup communication channel
When Outlook and Teams are both down, many teams suddenly have no way to reach each other. Agree ahead of time on a fallback, such as a group text, phone calls, or a separate messaging app that does not depend on Microsoft 365. Make sure managers have everyone’s mobile number somewhere other than Outlook.
Tell customers and vendors how to reach you
If email is unreliable, post a short note on your website or social media and update your phone greeting so clients know to call instead. For businesses that handle time-sensitive requests, a quick heads-up prevents missed orders and frustrated customers.
Work from files you already have offline
OneDrive and SharePoint can keep copies of files on your computer so you can still open them without a connection. If your team synced key folders beforehand, they can keep working on documents during an outage and the changes will sync once service returns.
Do not resend everything
Since Microsoft extended its email retry window to 48 hours, many delayed messages will still arrive. Resending large batches can create duplicates. For urgent messages, call the recipient instead.
Watch for scams
Big outages are a common hook for phishing. Be cautious of emails or calls claiming to be Microsoft support and asking you to sign in, reset passwords, or install software to “fix” the outage. Get updates from the official status page and your admin center only.
How to Prepare Your Small Business for the Next Outage
Every cloud provider has outages. The goal is not to avoid Microsoft 365, it is to make sure a bad day for Microsoft does not stop your business. Here is a practical checklist for small offices in Pasadena, Los Angeles, and Orange County:
- Write a simple continuity plan. One page is enough: who decides when to switch to backup tools, how staff communicate, and how you notify customers.
- Keep a contact list outside of email. Store staff, key client, and vendor phone numbers in a place that does not depend on Microsoft 365, such as a printed sheet or a separate secure app.
- Back up your Microsoft 365 data. Microsoft keeps its service running, but backing up your email, OneDrive, SharePoint, and Teams data is your responsibility. A separate backup protects you from accidental deletion, ransomware, and long outages.
- Sync critical files for offline use. Decide which folders your team cannot work without and make sure they are available offline on the right computers.
- Make sure more than one person can reach the admin center. If only one employee has admin access, nobody else can check Service health or open a support case.
- Know who to call. Whether it is an in-house person or an outside provider, someone should be responsible for checking status, communicating with staff, and confirming everything is working once the outage ends.
If you would rather not handle all of this yourself, managed IT services can cover monitoring, backups, and outage response, and our IT support team can help when something stops working. We make IT human: plain answers, not jargon.
Frequently Asked Questions
Is Microsoft 365 down right now?
Check status.cloud.microsoft for the current public status, and the Service health page in the Microsoft 365 admin center for incidents affecting your organization. As of Friday afternoon, November 13, 2026, Microsoft still listed Microsoft 365 as degraded while recovery from the November 12 outage continued.
What caused the November 2026 Microsoft 365 outage?
Microsoft said the disruption stemmed from an issue during an earlier network capacity upgrade. Its early updates described servers failing automated health checks and the remaining infrastructure becoming overloaded. Microsoft said it did not detect malicious activity and plans to release a full report.
Will I lose emails sent during the outage?
Microsoft extended its email delivery retry window to 48 hours to help protect delayed messages, so many emails should still arrive as the backlog clears. If something important has not arrived, confirm with the sender by phone.
Does Microsoft back up my Microsoft 365 data?
Microsoft keeps its service running and includes some recovery features, such as recycle bins and retention settings, but those are not the same as an independent backup that you control. A separate Microsoft 365 backup gives you another way to restore email and files after an accidental deletion, a ransomware attack, or an extended outage.
Should my business stop using Microsoft 365?
Usually not. Outages happen with every major cloud provider. A better approach is to plan for them with backup communication, offline files, and data backups so your team can keep working.
Get Ready Before the Next Outage
WinC Services helps small businesses across Los Angeles and Orange County keep their Microsoft 365 environments reliable and prepared. If this week’s outage exposed gaps in your backups or communication plan, book a complimentary consultation or call us at (213) 855-3506, and we will help you build a plan that fits your office.
