Workspace 365 has been developed on the idea that information should be available in the cloud. This means we want to avoid duplicating information, in other words, printing. 

Although the print functionality is hidden in Workspace 365, it is possible. If the user is working in a Word file in the Office Online viewer, he can use the keyboard combination "CTRL + P". This combination will initiate a print run. When done inside the Chrome browser it looks as shown below.

The printer is available under the "change". You can choose print to a destination. The user is also able to download his file to his local device.