As of 23:30 UTC, VT Writer has been fully restored and is operating normally.
The Word Add-in is loading correctly and all features are functioning as expected. This incident was caused by an Azure Front Door configuration issue that affected Microsoft's Office.js library hosting service.
We have confirmed stable performance across all VT Writer functionality through our monitoring systems.
Thank you for your patience during this disruption. If you continue to experience any issues, please contact our support team at support@visiblethread.com
Posted Oct 30, 2025 - 00:33 UTC
Update
Update: As of 22:12 UTC, we are observing signs of recovery with VT Writer functionality. Many features are now operational again as Microsoft continues to restore their Azure Front Door services, which host the Office.js library our Word Add-in depends on.
Current State: - Core VT Writer functionality is returning to normal - Word Add-in is loading successfully for most users - Some users may still experience intermittent issues or slower performance - Full stability is not yet confirmed
Root Cause Update: Microsoft has confirmed the issue stemmed from an inadvertent configuration change to Azure Front Door services at approximately 16:00 UTC. They have deployed their last known good configuration and are gradually recovering nodes across their infrastructure.
Expected Resolution: Microsoft anticipates full recovery by 23:20 UTC (6:20 PM ET / 5:20 PM CT). We will continue monitoring our services closely and will confirm full operational status once we've verified stable performance across all VT Writer features. See: https://azure.status.microsoft/en-us/status
We appreciate your patience as services are restored.
Posted Oct 29, 2025 - 21:17 UTC
Monitoring
We are currently experiencing degraded performance with VT Writer due to an issue with Microsoft's hosted Office.js library, which our Word Add-in relies on for core functionality.
Impact:
VT Writer remains functional but may experience slower performance The VT Writer Word Add-in may fail to load or initialize properly Some features within the Word integration may be unavailable or respond slowly
Root Cause:
Microsoft's hosted Office.js library (https://appsforoffice.microsoft.com/lib/1/hosted/office.js) is currently experiencing availability issues. This is a Microsoft service that our Word Add-in depends on for initialization and operation.
Next Steps: We are monitoring the situation closely and are in contact with Microsoft support channels. This issue is affecting multiple Office Add-ins globally. We will provide updates as more information becomes available. For the latest updates on the underlying Microsoft service issue, you can track GitHub Issue #6249. We apologize for any inconvenience this may cause.