Microsoft 365 Alert – Service Degradation – Exchange Online – Users may be experiencing high latency when performing searches in Exchange Online – ONGOING

05/05/2026 08:42:00 AM

NHSmail Reference: INC46815876

Microsoft Reference: EX1297752

Issue Status: ONGOING

Issue Description: Users may be experiencing high latency when performing searches in Exchange Online.

Current Update: 05/05/2026 08:42:00 AM– Microsoft are continuing to monitor service health telemetry to validate that latency is successfully alleviated following our service optimizations aimed at expanding available resources and reducing overall latency. They will provide a timeline for impact remediation as once becomes available.

Scope of impact: This issue may impact any user attempting to perform searches in Outlook, Outlook on the web, or Outlook mobile.

Root cause: Outsised loads on service infrastructure from increased traffic and ongoing improvements is causing search latency issues and resulting in impact.

Next update by : Tuesday, May 05, 2026, at 6:00 PM UTC