Open Box Files from Office for iPad


I read the 2/17/15 press release stating:
“Today’s news is an important step toward a more open future. To get started, download the latest version of Office for iPhone or iPad, and with the Box app installed on your phone, you’ll be able to open and edit files stored in Box from within Office. Soon, we’ll update this with additional experiences on mobile, and we’ll make Office 365 on the web available later this year.”

Has anyone been able to make this work? I’ve upgraded my MS for iPad apps (Excel and Word), I have the most current Box App, but I’m unable to open Excel files stored in Box. When I launch the Excel app on my iPad, I can select open Cloud Storage, and can open Excel files in DropBox, but no option for Box…. Any suggestions? I’m on IOS 8.1.3….