Microsoft 365 Alert : Service Degradation – Exchange Online – Some admins may be unable to access the Exchange admin center – RESOLVED
05/09/2022 14:41:00 PM (BST)
NHSmail Reference : INC31456566
Microsoft Reference : EX426002
Issue Status : RESOLVED
Issue Description : Some admins may have been unable to access the new Exchange admin center.
More info : Impact was specific to the new Exchange admin center https://admin.exchange.microsoft.com
As a workaround and while Microsoft focused on remediation, admins may have been able use the classic admin center https://outlook.office365.com/ecp
Scope of impact : Impact is specific to some admins who are served through the affected infrastructure.
Final Update : 05/09/2022 15:21:00 PM – Microsoft is reviewing service monitoring telemetry to isolate the root cause and develop a remediation plan.
Root cause : A network authentication component misconfiguration, inadvertently resulted in admins receiving a 404 error when attempting to access the new Exchange admin center.
Next steps : Microsoft is reviewing their network authentication component configuration procedures to prevent this problem for occurring again.