I'm an IT admin trying to install the Smartsheet add-in for my users and am being faced with the "We received a bad request" error when trying to Connect with Office365 in Outlook. I have tried putting the ?prompt=admin_consent string the URL to give permissions, as well as add the add-in to the Exchange admin center. I DO NOT wish to give all users the ability to consent to applications as this a massive security concern. It's at the point where I log in with O365 credentials when Outlook prompts for it under the "Connect to Office365" link in the add-in, and it will actually flash to the page where it should be before reverting back to the "Connect to Office365" button.