Microsoft says it is “deeply sorry” for the disruption caused by the global outage that hit Teams, Outlook and AI software Copilot early on Friday morning Australian time.

The outage has crippled communications for businesses and governments globally, forcing some organisations to revert to fax machines and halting at least one bond repurchase ‌in Europe.

Microsoft says there’s no evidence of “malicious activity” and users may still have “intermittent access issues”.

Ashwin Pal, of accounting firm RSM Australia, says the outage is as a disaster for the Australian business sector, with costs running into billions of dollars.

Pal said that includes both direct and indirect costs. “A protracted event like this can easily be the straw that breaks the camel’s back for smaller entities.”

The outage is one of the longest in Microsoft’s history ‌and the second disruption to ‌its services this year.

Microsoft said ⁠the outage specifically hit features tied to Exchange Online – its cloud-based email and scheduling hub – leaving unconnected applications operational.

The incident deepens questions ​about the global reliance on a handful of major tech companies that supply both the essential software and the cloud infrastructure that underpins it.

Ashwin Pal, of accounting firm RSM Australia, says the outage could cost the economy billions. Photo: RSM Australia

Still, some analysts have questioned whether such incidents can push ⁠customers on to rivals due to the steep switching costs of replacing tools embedded so deeply in daily ‌operations.

Microsoft faced an outage ​with its 365 services in January this year and also in October last year.

Last month, it reported an outage of its Azure cloud platform that affected its suite of productivity software, and a ​range of industries ‌worldwide.

A spokesperson for the United Kingdom government said it was working with Microsoft to find a solution for the outage that hit organisations such as the ​National Health Service and London’s Metropolitan Police.

The outage hit features tied to Microsoft’s cloud-based email and scheduling hub Exchange Online. Photo: AP

Lack of access emails and other services was affecting the Metropolitan Police’s ability to report some crimes online although its ability to respond to calls was not affected.

The NHS said its local services were turning to alternate measures such as using IT systems or paper records.

For businesses, the fallout was widespread.

European exchange operator Euronext reported email disruptions, ​UK insurer ​Aviva activated backups for its earnings calls and Danish shipping giant Maersk warned ​customers of delayed updates.

US artificial intelligence giants OpenAI and Anthropic also faced issues with Microsoft connectors while Indian ‌airlines IndiGo, Akasa Air and Air India said their email support services were affected.

The outage also disrupted fund management at Taiwanese securities firms, life insurers and investment trust companies.

One of the companies went as far as cancelling a bond repurchase transaction, a source familiar with the situation told Reuters.

Another Taiwanese financial company resorted to using fax to confirm trades, a second source said.

In the US, electric truck maker Workhorse Group rescheduled its results on Thursday to November 16 while Switzerland’s Richemont briefly delayed its first-half results announcement on Friday.