On 12 November a Microsoft email server outage hit 74 countries and territories, crippling Outlook, Teams, SharePoint, OneDrive and Microsoft 365 Copilot. At its peak about 130,000 users in the US reported Outlook problems.

In India the issue lingered into Friday morning; Outlook and Teams were inaccessible. SpiceJet cancelled three Delhi departures because of the email failure, while IndiGo and Akasa Air said their support services were down.

The root cause surfaced in Exchange Online when many servers went offline unexpectedly. A core process overloaded those servers. Microsoft rerouted traffic and rebuilt affected servers. An executive vice-president confirmed no signs of cyber activity. Microsoft said recovery efforts were ongoing, but service health remained variable.

The incident underscores how much global operations—from airlines to government bodies—depend on cloud services. While the outage eventually eased, its impact was immediate and widespread across industries.