There's a attribute parameter on RSAT/ADUC user gorup configuration:
Open the ADUC, go to "View" then check "Advanced Features"
Then right click un the user/gorup -> Properties
In the tab "Attribute Editor" there is a attirbute unixHostDirectory
If the user was created in dashboard, that attribute is correctly configured.
If the user was created in RSAT/ADUC, that attribute is set on "not set" but if I modify the value of the attribute with the drectory, nothing happens: getent reports always / as home directory and if i login with that user on Windows the directory isn't create.
EDIT: the sentence in italic above could not be true... maybe it's necessary to wait some time after the modify so that it is applied
It's necessary to wait at least 5 minutes before the modify is applied and appears on getent