Microsoft 365 Alert – Service Degradation – Exchange Online – Admins may be unable to upgrade Distribution Lists to Unified Groups in Exchange Online – RESOLVED

17/12/2024 08:45:00 AM

NHSmail Reference: INC47508812

Microsoft Reference:EX953446

Issue Status: RESOLVED

Issue Description: Admins may be unable to upgrade Distribution Lists to Unified Groups in Exchange Online.

Final Update: 30/01/2025 08:30:00 AM Microsoft have confirmed the deployment of their fix has completed and the issue is resolved for all users.

Scope of impact: Some admins may be unable to upgrade their Distribution Lists to Unified Groups in Exchange Online.

Root cause: An update to include Simple Object Access Protocol (SOAP) headers in calls to code used in upgrading Distribution Lists to Unified Groups introduced a development platform compatibility issue that’s causing impact.

Next steps: Microsoft are reviewing their update testing and validation procedures to identify opportunities to improve impact detection and prevent similar future occurrences.

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