Microsoft 365 Alert – Service Degradation – Microsoft Teams – Users in the United Kingdom may be unable to sign-in to Microsoft Teams using iOS or macOS – ONGOING

Announcements Arpan Das

10/09/2026 10:37:00 AM

NHS.net Connect Reference: INC46931590

Microsoft Reference: TM1470091

Issue Status: ONGOING

Issue Description: Users in the United Kingdom may be unable to sign-in to Microsoft Teams using iOS or macOS.

Current Update: 10/09/2026 10:38:00 AM – Microsoft’s are reviewing service monitoring telemetry to isolate the root cause and develop a remediation plan.

Scope of impact: Impact is specific to some users attempting to sign-in to Microsoft Teams using iOS or macOS in the United Kingdom.

Next update by: Thursday, September 10, 2026, at 10:30 AM UTC