In Australia, people who rely on Microsoft 365 reported being unable to open inboxes at councils, courts and schools. The federal police and Asio, the domestic security and intelligence agency, were also affected.
Microsoft said on Saturday that it had fully restored service after a global outage that disrupted governments, businesses and public services.
The company said on its Microsoft 365 status page that it had completed work on the underlying issue and restored service to the remaining affected customers and regions.
It pointed users to further updates under incident MO1550821 in the Microsoft 365 admin center.
Downdetector said it received outage reports from users in more than 70 countries and territories. The total number of people affected was not clear.
Microsoft apologised on Friday and said the disruption was"not related to cyber"or artificial intelligence agents.
The company attributed the failure to a problem during an earlier network capacity upgrade that appeared after a recent network change, according to its account of the incident.
In Japan, government email became unavailable and staff resorted to text messages.
Microsoft said in January that it had more than 450 million paid commercial subscriptions to its 365 services. The company has also said on its website that about 430 million people use Microsoft 365 apps.
The outage has fuelled concern in Britain about reliance on a small number of technology companies, and it showed how failures can spread when many services depend on the same provider.