In the past, if you wanted to rent out PCs with Windows and Office installed, then you needed to acquire additional Rental Rights licences through a Volume Licensing agreement.
No more! Starting from 1 February 2016, these rights are granted with certain licences as long as you agree to the terms in the “Agreement for Leasing or Renting Certain Microsoft Software Products” document.
Essentially, acquire Windows licences through OEM, MPSA, Select Plus or Open, and Office licences through MPSA, Select Plus or Open, and you’re good to go. This site is useful and has a link to the agreement document: http://bit.ly/208VIm4.