The outage has prevented people from sending emails, managing calendars and hosting virtual meetings. (EPA Images pic)LONDON: A more than 12-hour outage of Microsoft Outlook and Teams crippled communications for businesses and governments globally on Friday, forcing some organisations to revert to fax machines and halting at least one bond repurchase in Europe.

Microsoft said server issues were behind the incident that also affected its Copilot AI assistant and that a broader roll-out of software fixes was starting to stabilize the system. It said it was not aware of any malicious activity.

Outlook and Teams are two of the most widely used workplace applications with hundreds of millions of users. The outage prevented people from performing essential functions such as sending emails, managing calendars and hosting virtual meetings.