Microsoft is still struggling to restore Outlook, Teams and other workplace apps after a global outage that has lasted more than 14 hours.
The disruption began on Thursday and has hit users in at least 74 countries, according to Downdetector, the outage-tracking website.
On Friday morning Microsoft said it was "seeing positive results" in improving stability and capacity, and was rolling out its fixes more widely across affected regions.
Earlier it had admitted that its repairs were not producing a sustained recovery.
The company blamed "elevated load" on its infrastructure: a number of servers had become unexpectedly unavailable, leaving the remaining machines overloaded.
It said it had found no sign of malicious activity and would publish the root cause once the problem was fixed.
Reports of problems with Outlook peaked at about 140,000 on Thursday evening, according to Downdetector, which is more than 2,000 times the normal level.
About 43,000 reports were still coming in at 7am UK time on Friday as Europe started work.
More than 430 million people use Microsoft 365, the company's office software suite, which includes Outlook, Teams and the Copilot AI assistant.
The disruption has spread to other technology companies, with OpenAI and Anthropic both reporting problems with their own tools.
Government agencies in Japan and Australia said their email systems had been affected, including Australia's domestic intelligence agency, the BBC reported.
Courts in the Philippines, Singapore and North America warned that communications would be delayed.
IndiGo, India's largest airline, said its email customer support was down, while its rival Air India used the moment to advertise flights on social media.
The outage revives memories of July 2024, when a faulty CrowdStrike update crashed about 8.5 million Windows computers and grounded flights around the world.
The source is a live page, so check Microsoft's latest status update before this goes out. I've left out the Nvidia item at the bottom of the BBC feed because it has nothing to do with the outage.
