[Samba] SAMBA using existing users and passwords on Linux

[Fernando Gonçalves]

Good afternoon.
I really need some help.
I have a VM running Oracle Linux version 7 and samba version 4.10.4.
I want samba to use local Linux users and passwords (/ etc / passwd and /
etc / shadow).
As I researched on the internet it would be enough to configure samba to
not encrypt passwords, through the item:

encrypt passwords = no

However it is not working.
can anybody help me?
Thanks in advance.