Allow single sign-on for Microsoft personal sites using this profile

'Allow single sign-on for Microsoft personal sites using this profile' option allows non-MSA profiles to be able to use single sign-on for Microsoft sites using MSA credentials present on the machine. This option shows up for end-users as a toggle in Settings -> Profiles -> Profile Preferences for non-MSA profiles only. If you disable this policy, non-MSA profiles can't use single sign-on for Microsoft sites using MSA credentials present on the machine. If you enable this policy or don't configure it, users can use the Settings option to ensure non-MSA profiles are able to use single sign-on for Microsoft sites using MSA credentials present on the machine provided only a single MSA account exists on the machine.