14/12/2023 12:35:00 PM
NHSMail Reference: INC40304431
Microsoft Reference: EX698071
Issue Status: RESOLVED
Issue Description: Some users may be unable to send or receive email messages in Exchange Online using third-party apps.
More info: Specifically, this only impact users with third-party apps that utilize the Exchange Web Services (EWS) API.
Final Update: 19/12/2023 08:45:00 AM – Following Microsoft’s completed fix deployment, their internal service telemetry has confirmed that impact has been remediated.
Scope of impact: Impact is specific to some users, who are served through the affected infrastructure, with third-party apps that utilize the Exchange Web Services (EWS) API.
Next steps: Microsoft are further analyzing the code regression and the affected EWS API to help them isolate similar problems during our testing and validation processes and before impact can be produced.