Yes. In the same paragraph you will find: "...Microsoft Office must be installed locally on the same computer as Designer." So, if you can only use Office 356 via your browser, NPrinting will not be able to use it to author Office report templates. You will get the error: "QlikView NPrinting can't find a supported reporting template editor for the file...."
You need to install Office on the machine itself and NPrinting will use the installed version of Office.
EDIT: Only Windows Installer (MSI) versions of MS Office are supported - Qlik-to-run installations do not work.
HTH - Daniel.