OneCall NZ incident
Microsoft 365 - Users may experience intermittent access issues to multiple Microsoft 365 services
OneCall NZ experienced a minor incident on December 16, 2021 affecting Microsoft 365, lasting 2h 1m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Dec 16, 2021, 01:56 AM UTC
User Impact: Users are unable to connect to their mailboxes and other Microsoft 365 services Current status: Microsoft are investigating a potential issue and checking for impact
- investigating Dec 16, 2021, 02:22 AM UTC
User Impact: Users may experience intermittent access issues to multiple Microsoft 365 services. More info: Impacted services include but are not limited to: -Exchange Online -Microsoft 365 admin center -Partner portal Additionally, active sessions may not be affected by this problem.
- investigating Dec 16, 2021, 02:28 AM UTC
Current status: Microsoft have determined the cause of the issue and are working on a fix that they expect to mitigate impact.
- investigating Dec 16, 2021, 02:57 AM UTC
Current status: Microsoft have completed mitigation efforts and are validating that the impact has been mitigated. In parallel, they are monitoring the affected services for stability.
- resolved Dec 16, 2021, 03:57 AM UTC
Final status: Microsoft have determined that components between Microsoft account (MSA) and Azure AD sign-in services were not functioning as expected. Microsoft have rerouted traffic to alternate infrastructure to resolve the issue. Microsoft have confirmed via customer reports and extended monitoring that the issue is mitigated.