They do still have the option to force local accounts only. Fire up Group Policy Editor "GPedit" then Computer Config/ admin templates/ system/ user profiles/ and enable "Only allow local user profiles".

"If you enable this setting, the following occurs on the affected computer: At first logon, the user receives a new local profile, rather than the roaming profile. At logoff, changes are saved to the local profile. All subsequent logons use the local profile. "

This is on Windows 10 Pro. There's a surprising number of settings that can be configured here. As Microsoft continues to dumb down menus and the control panel they are normally tucked in here. Or you may rarely have to dig into Powershell and the registry, very rarely.