Microsoft disclosed that certain users have been unable to access Azure and Office 365 services since late Monday afternoon, Australian time.
The outage affects users who are required to sign in using multifactor authentication, according to Microsoft. Affected services include Azure Active Directory and Office 365, the company said.
The Azure outage includes the Europe, Asia-Pacific and Americas regions.
The Azure issue means that users may experience difficulties signing into Microsoft cloud services such as Azure Active Directory, if multi-factor authentication is required by policy.
At the time of writing, Microsoft said "Engineers have deployed the hotfix which eliminated a connection between Azure Identity Multi-Factor Authentication Service and a backend Service. The deployment of this hotfix took time to propagate across the impacted regions, primarily Europe and Asia-Pacific."
The fix appears to have worked: Microsoft reports "a reduction in user authentication errors as a result". But the incident isn't over: Microsoft says "As a consequence of this fix, Engineers have determined that a subset of customers might not be receiving prompts (SMS, Call or Push (via the app))."
The Office 365 issue also impacts users who require multi-factor authentication and means they may not be able to log in or conduct password resets.
Microsoft has not provided a timeframe for the problems' resolution, but is posting regular updates about the incidents. CRN Australia will update this story as the situation develops.