C:Usersdomainuser>net use \samba_srvmy_share /USER:pi
Enter the password for 'pi' to connect to 'samba_srv':
System error 86 has occurred.

The specified network password is not correct.

osboxes@osboxes:~$ smbclient \\samba_srv\my_share -U pi
WARNING: The "syslog" option is deprecated
Enter pi's password:
Domain=[HEMMA] OS=[Windows 6.1] Server=[Samba 4.5.12-Debian]

# cat smb.conf
# Global parameters
[global]
        server string = %h server
        workgroup = HEMMA
        log file = /var/log/samba/log.%m
        logging = file
        max log size = 10000
        usershare allow guests = Yes
        unix extensions = No
        map to guest = Bad User
        obey pam restrictions = Yes
        pam password change = Yes
        passwd chat = *Entersnews*spassword:* %nn *Retypesnews*spassword:* %nn *passwordsupdatedssuccessfully* .
        passwd program = /usr/bin/passwd %u
        server role = standalone server
        unix password sync = Yes
        dns proxy = No
        idmap config * : backend = tdb
        mangled names = No
        valid users = @users


[homes]
        comment = Home Directories
        browseable = No
        create mask = 0700
        directory mask = 0700
        valid users = %S

[netlogon]
        comment = Network Logon Service
        path = /home/samba/netlogon
        guest ok = Yes

[my_share]
        comment = my share
        path = /home/pi/
        wide links = Yes
        create mask = 0770
        directory mask = 0770
        read only = No
        valid users = pi