User impact: Users may be experiencing high latency when performing searches in Exchange Online.

Current status: After determining that the source of impact is related to high loads on service infrastructure, we’ve implemented optimizations to expand available resources and reduce latency. We’re monitoring service health telemetry to ensure that latency is successfully alleviated.

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

Start time: Wednesday, April 01, 2026, at 7:00 AM UTC

Root cause: The search latency was caused by outsized loads on service infrastructure from increased traffic and ongoing improvements.

Next update by: Monday, May 04, 2026, at 6:00 PM UTC