For more information about our Incident Response and Communications please read this support article.
We also maintain a list of Known Product Issues separate from this site here.
[Medium] Issues with Box Drive
Postmortem
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.
Between May 21, 2026 at 10:56 PM and May 22, 2026 at 2:07 AM PDT, some customers attempting to sign into Box Drive may have experienced errors or been unable to complete the login process. The issue affected a subset of customers who use a particular Mobile Application Management (MAM) service that was not universal across all users.
The problem was caused by a change to our single sign-on configuration that prevented certain Box Drive logins from completing. Service was restored after we reverted the configuration and validated successful logins for impacted users.
We are reviewing our deployment and administrative procedures to reduce the risk of this type of issue recurring.
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