I use a Microsoft account so I can use the same account across my multiple desktops, my laptop, my wife's surface, and several different friend's PC's as well. We do our file permissions on our network storage based on our Microsoft accounts so it's super easy to grant/revoke permissions to things and have that work globally for us. On Windows, this is all free (not a single second of additional setup) with a Microsoft account. What instant thing would do the same for me in Linux?