Hi Frank,
It is possible that there will be a configuration that needs to be applied to be able to do a bypass on the BitLocker set on your device. To be able to get those configurations and the correct settings, we suggest to have your concern posted on our TechNet forum. By posting on the said forum, IT professionals and specialists would be able to provide you troubleshooting steps that you can apply on your company computer and get you up and running with your OneDrive on a reverse proxy.
Should you have any other queries, feel free to contact us anytime.