Incident Initiation
At 10:18 AM CET on June 12, 2025, we identified an issue that was preventing users from saving and sharing documents through the Library task-pane in both Office on-premises and online environments.
Investigation
Our investigation revealed that the issue stemmed from a change made in the Integration Management system. This update, intended to fix a separate issue in the Composer component, inadvertently impacted the Library task-pane. This change was rolled out by 08:09 AM on June 11, 2025 to all production clusters.
Mitigation and Resolution
To fix the issue, we adjusted the update to ensure it only applied to its intended target. The corrected version was tested and successfully deployed to all production environments at 12:13 PM CET on June 12, 2025.
Impact and Scope
Although the issue was reported by only one tenant, it had the potential to affect all users across all environments, making the impact significant. The issue has been fully resolved.