Microsoft 365 Alert – Service Degradation – Exchange Online – Users’ Office Message Encrypted (OME) email sent from Exchange Online may be unable to be accessed by some recipients – RESOLVED

Announcements Habiba Tabasum

24/05/2023 09:09:00 AM (GMT)

NHSmail Reference : INC36011027

Microsoft Reference : EX559755

Issue Status : RESOLVED

Issue Description : Users” OME email sent from Exchange Online may be unable to be accessed by some recipients.

More Info : This issue affects users that are external to the organization of the user sending the message. The external user generates a One Time Passcode and is routed to the OME portal, but the site continuously loads.

Users receiving OME email messages from other users in the organization aren’t affected.

Final Update : 26/05/2023 08:55:00 AM – Microsoft have determined that a recent deployment contained issues that led to the CDN not delivering the scripts required for OME to work. They developed and deployed a fix and have confirmed via telemetry and customer report that impact is now remediated.

Scope of impact : Impact may occur for any of your users sending OME email messages through Exchange Online to some external users.

Root cause : A recent deployment contained issues that led to the CDN not delivering the scripts required for OME to work.

Next Steps : To help prevent similar impact in the future, Microsoft are further reviewing their deployment review and release protocols.