Hint: you can’t actually install it on a Mac… I had to google to even figure out what “Office Online Server” was. Above and beyond the usual fandango of getting an open license agreement and creating a Windows Live account for the same email address the OLSA is attached to and creating a VLSC account on that Windows Live account and taking ownership of the OLSA… things get deeply weird when you try to download it. If you bought Office 2016 for the Mac by way of volume licensing – for example, if you’re a non-profit and got it through TechSoup – you may have a hell of a time figuring out how to actually GET it.