By Nazreen Daud, Founder of Roquepress · Published 13 Nov 2026 · Last updated: 13 Nov 2026 · Originally shared on LinkedIn

The short answer: when Outlook is down, do not assume your important email arrived. The Microsoft 365 outage on Friday 13 Nov 2026 reached Singapore. A proposal I sent to a potential client never got through, and my personal Outlook inbox stayed quiet. Have a backup channel, a second place for critical files, and a habit of following up.

In this article

What happened during the 13 Nov Outlook outage?

Microsoft went down. And suddenly, businesses realised how dependent they are on one company.

It was a chaotic Friday morning in Singapore. Outlook and other Microsoft 365 services had a major global disruption, and Singapore wasn't spared. Some of my clients were affected too.

Here's what happened to me.

I sent a proposal to a potential client. I waited for a response. Nothing. Later, I discovered they hadn't received it. Even my personal Outlook inbox hasn't received any new emails since morning. For a moment, I wondered what was going on. Then I saw the news.

The disruption started overnight in Singapore time, not when offices opened. The BBC, citing Downdetector, says problems were first detected just after 4:15 PM GMT on Thursday 12 Nov, which is 12:15 AM SGT on Friday 13 Nov. Downdetector's Outlook reports peaked around 2:00 AM SGT: nearly 140,000 worldwide, according to the BBC, and more than 130,000 in the US alone, according to Reuters-sourced coverage in The Straits Times and CNA. Those are user reports, not an official Microsoft count. The BBC also said the outage reached 74 countries and territories.

In Singapore, The Straits Times said Downdetector began recording user reports at about 2:00 AM on Friday 13 Nov, with Outlook reports climbing from about 730 at 8:15 AM to 1,130 at 9:15 AM. By 1:08 PM, CNA reported 502 Outlook user reports and 299 Microsoft 365 user reports here. Lower than the mid-morning peak, but not zero.

GovTech told CNA that some government systems, including email, were affected. Emergency services at 995 and 999 stayed operational, and Singpass was not affected. Public officers could continue to use Microsoft Teams, though email replies to the public may be delayed.

The Singapore Courts issued an advisory the same day: incoming and outgoing court emails were having problems. Online filing was still working. For urgent matters, they asked people to call 6587 8423.

As of about 2:46 PM SGT on Friday 13 Nov 2026, Microsoft's public status page still showed a Microsoft 365 service degradation, and I did not see an official ETA. The BBC, at 2:25 PM SGT, quoted Microsoft as still working to recover frontend servers. CNA reported that earlier adjustments had not produced a sustained recovery. If you are reading this after the incident is declared over, treat that as a Friday afternoon snapshot and check the official page.

What actually went down, and what did not?

Email took the hardest hit. It was not every Microsoft product, all at once. Microsoft said the issue was primarily with Exchange Online, the cloud service behind Outlook email, calendars, contacts and tasks. The Verge quoted Microsoft's Ben Hope on that point, and official updates also pointed to "elevated load" on the infrastructure.

Service health notices quoted by ST and CNA said Microsoft 365 features that depend on Exchange Online and email were affected, while elements that do not remained functional. The public status page showed no Azure issue when I checked.

That is why I have not described this as a Microsoft Teams collapse on the same scale as Outlook. The BBC reported Microsoft as saying messaging and online meetings were largely functional, even though some users could not see calendar details or certain files.

Microsoft has said this was not a cyber incident. I am repeating that only because fake "IT support" messages tend to appear during an outage. The BBC reported banks and universities warning people about unexpected texts or emails offering to fix the problem. If someone you do not know asks you to download an app or join a call to "restore Outlook", do not.

Why can one provider's bad day stop a small business?

Because so much of the work sits in one place: the inbox.

Imagine running a business where customers cannot reach you, proposals and invoices are not getting through, the team cannot get to important documents, and appointments are up in the air. All because one service provider is having a bad day.

It is not necessarily your fault. The responsibility to keep the business running is still yours.

This is not an argument for dumping Microsoft. I personally use Google for most of my business operations, and Google can have outages too. Every platform can. The point is simpler. If the tool you use every day stops working, what is your Plan B?

If you want a second pair of eyes on how your follow-ups work when email is unreliable, book a call with me.

What should I have ready before the next outage?

Here are three things I think every business owner should consider. None of them needs a big IT project.

Have a backup communication channel

If Outlook is your primary email, consider having an independent Google account as a backup. Independent matters. A Gmail address that still routes everything back through the same Microsoft mailbox will not help you on a morning like this.

And do not underestimate WhatsApp or a simple phone call. Sometimes the simplest tools save the day.

Tell a few people in advance: your partner, your assistant if you have one, and your most important clients. A backup channel that nobody knows about is not a backup. Write it down somewhere that does not live only inside the tool that just failed.

Don't keep everything in one basket

Important proposals, contracts, customer information and documents should have secure backups. If your business runs on Microsoft 365, consider keeping critical files accessible through another platform or offline. Just make sure they are properly secured.

You only need the few files you would actually open if email and cloud login wobbled for a day: the proposal you just sent, the invoice that has to go out, the contract sitting with a client, and the contact list you cannot reach.

The same habit shows up when people automate a process and then cannot say who can still reach it. I wrote about that in who owns your small business automation. If only one login, in one suite, can open the file, you do not have a backup.

Never assume an email has reached its destination

This one hit me personally today.

Sending a proposal does not mean the client received it. For important matters, follow up. A simple WhatsApp message asking, "Hey, did you manage to receive my proposal?" can make a difference.

That is not nagging. It is confirming delivery. The same gap appears after a verbal yes, when you think the next email has already done the job. I wrote about that in what to do when a client says yes but has not paid the deposit.

And if you have a CRM, use it to keep track of conversations and follow-ups, so the record still exists if the inbox does not. If you are still choosing one, I set out three jobs to test in a CRM for a solo business before you commit.

Technology is supposed to support the business. It should not be the single point of failure that stops everything.

What should I check before the next outage?

You need a short list you can use on a Friday morning.

  • I have a second way to reach clients and my team that does not depend on Outlook, and they already know what it is.
  • I can open today's critical proposals, invoices, contracts and contacts without waiting for Microsoft 365 to recover.
  • Those copies are stored securely, not in an unlocked shared folder.
  • After I send an important email, I have a habit of confirming it arrived, by WhatsApp, a call, or another channel.
  • I log those conversations and follow-ups somewhere other than my inbox, even if that is a simple list to start with.
  • I know where to check official status, starting with Microsoft's public status page, so I am not relying on a rumour in a group chat.
  • I have told my team not to trust unexpected "IT support" messages during an outage.

If you'd like me to walk through this list with you, book a call with me.

Who is this not for?

This is not a root-cause report, and it is not for an IT team that already has a tested email continuity plan.

It is for owners of small service businesses who live in their inbox, where a proposal, an appointment or an invoice going missing is a real problem. If your work barely uses email, you can stop here.

It is also not a recommendation to abandon Microsoft, or to switch everything to Google in a panic. The useful move is a Plan B, not a sudden platform change.

FAQ

What should I do when Outlook goes down?

Switch to a channel that still works, and check whether important email actually arrived. Message or call the people waiting on a proposal, invoice or appointment. Open the few files you need from a backup or offline copy. Then watch Microsoft's public status page rather than refreshing the same broken inbox.

Was Singapore affected by the Microsoft Outlook outage on 13 Nov 2026?

Yes. GovTech said some government systems, including email, were affected, while Singpass and the 995 and 999 emergency lines were not. The Singapore Courts said incoming and outgoing court emails were having problems. Downdetector user reports for Outlook in Singapore also climbed through Friday morning, according to The Straits Times.

Should I leave Microsoft after an Outlook outage?

Not in a panic. Every platform, Google included, can have a bad day. The more useful question is whether your business can still reach clients, open critical files and confirm that an important message arrived when your main provider fails.

How do I know if a client received my email?

You do not, not from the act of hitting send. For important matters, confirm on a second channel, such as a short WhatsApp message or a call. Log that follow-up in a CRM or a simple list, so the record does not live only in the same inbox.

So, if your main email and communication platform went down for 24 hours, could your business still operate?

About the author: Nazreen Daud is Founder of Roquepress and a Malay web consultant and marketer in Singapore. He has built websites for businesses since he started freelancing in 2012, registered Roquepress in 2019 and founded Mulacan in 2022. He writes practical, hype-free notes on websites, SEO and AI for service businesses.