Current status: Microsoft completed redistributing connection traffic across our worldwide infrastructure, and is moving additional traffic off the affected infrastructure to further reduce load. Microsoft is also restarting affected servers to return them to service. In parallel, investigating whether the elevated traffic reflects a genuine increase in requests or a shift in how traffic is being routed across our infrastructure.
Posted Nov 12, 2026 - 19:11 UTC
Update
Microsoft Update - Users may be unable to connect to multiple Microsoft 365 services
User impact: Users may be unable to connect to multiple Microsoft 365 services.
More info: Potentially impacted services include: - Exchange Online - Microsoft Teams - SharePoint Online - Microsoft Copilot 365 - Microsoft Defender XDR
Posted Nov 12, 2026 - 18:40 UTC
Investigating
Microsoft 365 is currently experiencing issues Users may be unable to connect to their mailboxes in Exchange Online through multiple connection methods. Teams are currently assembled and working to resolve the issue. We appreciate your patience.
User impact Users may be unable to connect to their mailboxes in Exchange Online through multiple connection methods.
More info Potentially impacted connection methods may include: - Outlook on the web - Messaging API (MAPI) - Exchange ActiveSync (EAS) - Representational State Transfer (REST) API
Scope of impact This issue may affect users in North America, Latin America, Canada, and Chile.
Tracking Number: EX1550543
Posted Nov 12, 2026 - 18:05 UTC
This incident affects: Zix - Cybersecurity (Zix Office 365).