Microsoft 365 Alert – Service Degradation – Exchange Online – Some users’ Outlook mobile contacts are missing from the native contacts app on iOS devices – RESOLVED

Announcements Habiba Tabasum

20/03/2023 10:11:00 AM (GMT)

NHSmail Reference : INC34860541

Microsoft Reference : EX528891

Issue Status : RESOLVED

Issue Description : Some users’ Outlook mobile contacts are missing from the native contacts app on iOS devices.

More Information : Impact is limited to users with contact sync enabled on their iOS devices.

Users who haven’t yet upgraded to Outlook for iOS version 4.2309.2 can do so to restore missing contacts immediately. For those users who previously upgraded to version 4.2309.2, impact will persist until Microsoft deploy the new build that includes the fix.

Final Update : 22/03/2023 09:07:00 AM – Microsoft have validated that the update contained in the most recent version of the iOS Outlook mobile app successfully mitigated impact. If users are still experiencing impact, please recommend that they update to version 4.2309.3 of the iOS Outlook mobile app to resolve the issue.

Scope of impact : This issue may impact any iOS users with contact sync enabled on their iOS devices and who are leveraging a specific Outlook for iOS version when attempting to view Outlook mobile contacts in the native contacts app.

Root cause : A recent change, intended to improve the contact sync process between the Outlook mobile client and the native contacts app, contained a code issue which is resulting in impact.

Next steps : Microsoft are reviewing the code issue contained within the recent change to better understand how this issue occurred, and to evaluate how to prevent these issues from occurring in the future.