If this latest bit of intel is true, it would be another smart business move by Microsoft. Supposedly, the Redmond based mega-corp is courting some interesting agreements with OEMs like Samsung and others. Microsoft is supposedly offering to reduce the amount of patent licensing fees they charge for various Android-related patents in exchange for pre-installed Microsoft software on Android devices. Here's a quote with the details,

Android hardware manufacturers have all signed a patent licensing agreement with Microsoft for various essential technologies developed by the company. However, according to findings from Taiwan’s and China’s smartphone/tablet upstream supply chain, Microsoft is offering discounts to those who pre-install Office programs such as Word, Excel, PowerPoint and OneNote, as well as OneDrive and Skype onto their Android devices. So far, 11 hardware partners are signed up to the deal.
This seems like a win-win for both parties. The OEMs get to eke out a bit more profit from their Android devices, while Microsoft gets relatively cheap product placement.

Source: AndroidAuthority