Box incident
[Medium] Issues with Box Edit and Microsoft Office Online
Box experienced a major incident on July 16, 2026 affecting Microsoft Office Integration and Box Edit / Tools, lasting 18m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Jul 16, 2026, 09:30 PM UTC
Box is investigating reports of a momentary issue with Box Edit. Affected services are subject to change as the investigation continues.
- investigating Jul 16, 2026, 09:30 PM UTC
We are continuing to investigate this issue.
- identified Jul 16, 2026, 09:45 PM UTC
Our team has identified the underlying cause of this issue and is working to take remediating steps.
- monitoring Jul 16, 2026, 09:47 PM UTC
Our team has taken steps to remediate this issue and is seeing improvement for the Microsoft Online service and Box Edit.
- resolved Jul 16, 2026, 09:48 PM UTC
After further monitoring, this incident is now considered resolved. Microsoft Office Online and Box Edit has been restored to full functionality.
- postmortem Jul 31, 2026, 01:21 AM UTC
_Notice and disclaimer: Box is providing this preliminary information subject to further review and analysis. To the best of our knowledge, this is the current state and we may update as more information is confirmed._ On July 16, 2026 between 1:00 PM and 2:40 PM PDT, some customers may have experienced errors when attempting to open or edit files through any Open With integration in the Box web application. Affected users reported failures opening files and permission-like errors for certain files. A recent API model release introduced a regression that prevented customers from opening or editing documents through any Open With integration in the Box web application. The issue was resolved by rolling back the release. We are reviewing our deployment practices to help prevent similar disruptions in the future. We are conducting a full engineering postmortem and our overview is subject to change with further analysis and findings. In the event our continuing investigation yields further substantive findings, we may publish additional analysis after the conclusion of the full engineering postmortem. We are continuously working to improve Box and want to make sure we are delivering the best product and user experience we can. We hope we have provided some clarity here and we would be happy to answer any questions you may still have regarding this matter. Sincerely, The Box Team