As it turns out the ability to mass/bulk update units is performed by our support team. We invite you to contact support via https://helpcenter.trackunit.com/ or email supportus@trackunit.com (If your outside of North America you can contact support though your regional email). You can add a table or attach a document to better help support with your needs.

Thanks for reaching out, feel free to reply in this tread if you need additional information.

Check out our Product Portal page, a living road map of all the features and products in development. 

Trackunit Product Portal