A large Microsoft outage disrupted Outlook, Teams and the wider Microsoft 365 suite for several hours overnight, leaving users across the world unable to open mailboxes, send email or join some meetings. By early Friday morning IST, Microsoft said it had begun bringing servers back, but recovery was gradual. This account is based on reports published up to about 7 am IST on 13 November, and the situation may have changed since.

What happened

According to India Today, reports of Outlook problems on the outage tracker Downdetector peaked at around 1.30 am IST on Friday (1 pm Eastern time on Thursday), at 1,38,058. By about 4.30 am IST the count had fallen to roughly 34,490. The Times of India put the peak at nearly 1.3 lakh reports. The two figures are close, and both are counts of user reports, not a measure of how many people were actually affected.

Microsoft's own updates, quoted by both outlets, said the main problem was with Exchange Online, the service behind Outlook email. The company said a group of servers had become unavailable after failing automated health checks, which pushed extra load on to the servers that were still running. It stressed that the load was not caused by a rise in overall traffic.

Which services were hit

Users reported trouble with Outlook, Teams, Word, Excel, PowerPoint, SharePoint, OneDrive and Microsoft's Copilot assistant. India Today also reported that connectors used by AI services from OpenAI and Anthropic were affected. Microsoft told users that Teams had been restored in North America, citing the news agency AP, though some people still saw connection problems.

What Microsoft says it is doing

The company said it was returning part of the affected servers to service and that they had stayed stable so far. It said it was moving traffic to alternative routes where possible and was temporarily limiting which types of traffic could reach the affected infrastructure in some locations. Microsoft also described testing a different health-check method on some servers, which allowed them to return, and then rolling that out more widely. It added that it was building an automated process to detect and restart servers that stop responding.

Microsoft has paused deployments and configuration changes while it checks whether a recent update played a part. It named configuration updates as a possible cause, but said the investigation was still going on. No final cause had been confirmed in the reports we reviewed.

What it means in India

Neither report gives figures for India, so it is not clear how many Indian users or businesses were affected. The outage began in the US evening and ran into the Indian early morning, so many offices would find the effect as the working day starts, especially teams that rely on Outlook for mail and Teams for meetings.

What users can do

Microsoft said recovery would be gradual as capacity returns and clients reconnect, so a mailbox that still fails to open may come back on its own. Some practical steps follow from that.

  • Check the Microsoft 365 service health page or the company's official status posts before changing settings on your device, because a local fix will not help if the fault is on Microsoft's side.
  • Try the web version of Outlook or the mobile app if the desktop app is not connecting.
  • Avoid sending the same important message repeatedly, which can create duplicates once service returns.
  • For time-critical meetings, keep a fallback such as a phone call or another video tool.
  • Do not click links in emails that claim to restore your account. Fraudsters often use outages to send fake messages.

Why outages like this matter

Millions of offices, schools and government departments depend on a small number of cloud suppliers for mail and documents. When one fails, the effect spreads quickly, and the repair is out of the users' hands. Companies often plan for it with backup channels, and this episode is a reminder of why that planning matters.

What to watch next

The next things to look for are Microsoft's confirmation that all services are fully restored, a written explanation of the root cause, and whether configuration changes are the reason. Microsoft usually publishes a post-incident report after a major failure of this kind. We will update this story if the company confirms the cause or if Indian users report significant disruption.