SHD / MC Checker

[serviceDegradation] EX535069 | Exchange Online | Users’ mailbox and calendar data may not sync as expected in the Outlook mobile client for iOS devices



EX535069 | Exchange Online | Users’ mailbox and calendar data may not sync as expected in the Outlook mobile client for iOS devices

Status serviceDegradation
Classification incident
User Impact Users’ mailbox and calendar data may not sync as expected in the Outlook mobile client for iOS devices.
Last Updated 03/30/2023 15:22:10
Start Time 03/30/2023 15:17:44
End Time
Latest Message Title: Users’ mailbox and calendar data may not sync as expected in the Outlook mobile client for iOS devices

User impact: Users’ mailbox and calendar data may not sync as expected in the Outlook mobile client for iOS devices. 

Current status: We’ve received reports of an issue in which users’ Outlook mobile mailbox and calendar data may not sync as expected in the Outlook mobile client for iOS. After preliminary investigation, we traced impact back to a conditional access policy issue within a recent update, version 4.2311.0, which is preventing users leveraging this version from syncing their Outlook mobile client as expected. We’re exploring potential mitigative options to address this issue for affected users, and in the interim recommend avoiding upgrading to Outlook for iOS version 4.2311.0. 

Scope of impact: Any user using Outlook for iOS version 4.2311.0 may experience impact. 

Start time: Wednesday, March 29, 2023, at 11:27 AM UTC

Root cause: A conditional access policy issue within a recent update, version 4.2311.0, is preventing users leveraging this version from syncing email and calendar data in the Outlook mobile client as expected on iOS devices. 

Next update by: Thursday, March 30, 2023, at 6:00 PM UTC