Microsoft 365 Alert – Service Degradation – Exchange Online – Admins’ user directory object changes may sometimes fail to sync between on-premises and Exchange Online – RESOLVED

Announcements Habiba Tabasum

21/08/2023 08:44:00 AM (GMT)

NHSmail Reference : INC37745385

Microsoft Reference : EX667944

Issue Status : RESOLVED

Issue Description : Admins’ user directory object changes may sometimes fail to sync between on-premises and Exchange Online.

More info : As a result of the pending directory object changes, some users are unable to receive internal email messages. The problem appears to be a failure of the Forward Sync process.

Final Update : 13/09/2023 08:30:00 AM – Microsoft confirmed, through the examination of logs formerly exhibiting impact instances, that the issue is resolved and the problem is no longer occurring for admins.

Scope of impact : This issue affects any admins performing user directory object changes which may sometimes fail to sync between on-premises and Exchange Online.

Root cause : A sync issue was causing the Active Directory (AD) object ID Globally Unique Identifier (GUID) to return as empty in some instances when running the undo-softdelete cmdlet is resulting in impact.

Next steps : Microsoft are investigating how the sync issue was initially introduced so they can better prevent this issue from occurring in the future.