Microsoft is having worldwide problems with its cloud software, which has seen some people locked out of its Office 365, Outlook and Teams products.
The company blamed a recent code change to its Azure Active Directory service, which manages user identities, for the outage, which began around 11am.
The company said the problem was non-regional - Microsoft-speak for "global".
"We've identified a recent change that appears to be the source of the issue," it said via Twitter around midday NZ Time.