Microsoft 365 Alert – Service Degradation – Exchange Online – Users may be unable to access the Exchange Online service through multiple connection methods – RESOLVED

Announcements Habiba Tabasum

15/09/2023 08:45:00 AM (GMT)

NHSmail Reference : INC38275372

Microsoft Reference : EX675238

Issue Status : RESOLVED

Issue Description : Users may be unable to access the Exchange Online service through multiple connection methods.

More info : The affected connection methods include:
– Outlook for the web
– Representational State Transfer (REST) API
– Calendar access through the Microsoft Teams apps
– Search through Microsoft Teams desktop client and web app

Final Update : 26/09/2023 11:18:00 AM – Microsoft finished applying their configuration changes to expedite resolution and confirmed via service health telemetry information that all impacted scenarios have been remediated successfully

Scope of impact : This issue may potentially impact any user attempting to access the Exchange Online service through Outlook for the web, methods utilizing the REST API, or their calendar through the Microsoft Teams apps.

Root Cause : A recent change intended to provide an updated method for Microsoft’s search service to perform searches introduced the latency responsible for impact.