CIFS Share is inaccessible even when you enter the correct username (storage user) and password. ACL settings are correct. Not joined to AD.
When the user is deleted and recreated with the same username and different User ID.
Edit smbpasswd and osmbpasswd with the new User ID.
# mcedit /var/smb/smbpasswd
# mcedit /var/smb/osmbpasswd
<remove .bash_profile to use mc>