Title: Users may have been unable to move items in any public folder in Exchange Online
User impact: Users may have been unable to move items in any public folder in Exchange Online.
More info: Affected users may have observed the following error message which stated, “The move or copy operation failed”.
Final status: We’ve successfully reverted the offending update and confirmed after a period of monitoring and confirmation from a sample of affected users that impact has been remediated.
Scope of impact: Impact was specific to users who were served through the affected infrastructure, when attempting to move items in public folders in Exchange Online.
Start time: Monday, January 15, 2024, at 9:00 AM UTC
End time: Tuesday, January 16, 2024, at 9:00 AM UTC
Root cause: A standard recent Exchange Web Services authentication update to the public folder tokens, inadvertently contained a code regression, resulting in errors when users attempted to move items.
Next steps:
– We’re further reviewing our standard authentication update procedures and the circumstances that lead to impact, so that we can identify next steps that’ll help us further improve the reliability and resiliency of our service.
This is the final update for the event.
