Microsoft 365 Alert – Service Degradation – Exchange Online – Users may see older draft email messages appear as recently modified in Exchange Online – RESOLVED

Announcements Arpan Das

26/05/2026 09:48:00 AM

NHSmail Reference: INC46835083

Microsoft Reference: EX1322762

Issue Status: RESOLVED

Issue Description: Users may see older draft email messages appear as recently modified in Exchange Online.

More info: Users may notice that previously created draft email messages appear with a recent modification date, even when no visible changes have been made. This behaviour can affect multiple draft items, where older drafts appear as if they were modified recently, leading to confusion when trying to determine when a draft was originally created or last edited.

Final Update: 27/05/2026 01:57:00 PM– Microsoft has confirmed that their deployment has completely saturated to all affected environments and verified through service health telemetry that this has successfully remediated the impact.

Scope of impact: Impact is specific to some users attempting to view draft email messages in Exchange Online.

Root cause: Annotation-only updates performed by the specific workload is incorrectly updating the LastModificationTime property on draft email messages, causing draft email messages to be incorrectly updated and resulting in older drafts appearing as recently modified in users’ mailboxes.

Next Steps: Microsoft are reviewing the impacting workload flow to better understand the source of the issue in an effort to prevent similar future occurrences.