The error indicates that my previous open was unsuccessful, and asks if I would like to open Excel in safe mode. So I close Excel, try to open it again without safe mode, and… nothing. As an Office 365 admin, you can check Office 365 service health. If you need more licenses, see Buy licenses for your Office 365 for business subscription. To remove a license from your subscription, see Remove licenses from your Office 365 for business subscriptio Any advice on how to solve this issue of Out...