A Microsoft service outage that began on Thursday evening, Istanbul time, disrupted Outlook, Teams, Microsoft 365 and Copilot for users in 74 countries and was still not fully resolved on Friday morning, Anadolu Agency (AA) and BBC Türkçe, carried by TRT Haber, reported.
What went wrong
Microsoft said the problem stemmed from higher load on part of its infrastructure across several regions, AA and BBC Türkçe reported. The company said the extra load was not caused by a rise in traffic: some servers went offline unexpectedly, which pushed their load onto the remaining infrastructure and led to connection errors.
Connections to Exchange Online, the service that hosts Outlook mail, were disrupted. Users had trouble opening email and calendars, while messaging and online meetings in Teams largely kept working, according to BBC Türkçe and Ynetnews.
On the outage-tracking site Downdetector, error reports for Outlook alone peaked at more than 130,000 on Thursday evening, according to figures cited by BBC Türkçe and Ynetnews.
Partial recovery, no timeline
Microsoft said it restarted the affected servers and tested changes to restore them. The company later said the changes had not produced the expected results, according to AA and Ynetnews. Problems continued into Friday, with no confirmed time for a full fix.
The disruption also reached other technology firms. OpenAI said its connections to Microsoft services were affected, and Anthropic reported a problem with its Microsoft 365 connector, AA, BBC Türkçe and Ynetnews reported.
Sources
- Microsoft 365, Outlook ve Teams’teki erişim sorunu 12 saati aştı (Haberler.com / AA)
- Microsoft’ta küresel kesinti: Outlook ve Teams hizmetlerinde erişim sorunu yaşanıyor (TRT Haber / BBC Türkçe)
- Microsoft struggles to restore Outlook and 365 as global outage enters second day (Ynetnews)
Photo: BalticServers.com / CC BY-SA 3.0, via Wikimedia Commons
