Greetings:
In my directory "App" there is no "Optional Features" page but I found it doing a keyword search in the Settings directory. I then did another keyword search "Fax" and discovered this feature does not exist in my MS 365 Personal version. So I feel pretty cheated. I'm running MS 365 Personal which updates automatically. There is no fax driver installed and, despite various claims around the web that all one need do is navigate to a checkbox, under Print and Document Services, this is not true. My system has no checkbox for a Windows Fax and Scan option on my system which is Windows 365 Personal. Worse, when I try to Google to find the driver for this feature, I receive the same erroneous instructions, like a broken record. Later, in this comment thread, one learns the Fax feature has been disabled.
The solution, obviously, is that (1) agents condition their replies knowledgeably to fit the system under discussion, not just regurgitate outdated information and (2) for MS to provide notice that this feature has been disabled. Clearly, currently, neither situation is in play.