There is a new feature in Windows 10 called Microsoft Print to PDF which allows to create PDF documents with every application with a print feature without any additional software. (This is possible in MacOS X since long time.)
For Microsoft Office application this feature is not required since they support a PDF export feature since quite a while.
This is most probably the end of XPS (XML Paper Specification). This was Microsofts answer to PDF. But XPS was never really established.
However it seams that this feature is not always available by default. The actication is shown in a YouTube video.