tls cafile

This option can be set to a file (PEM format) containing CA certificates of root CAs to trust to sign certificates or intermediate CA certificates. This path is relative to if the path does not start with a /.

Supported on: At least Microsoft Windows 7 or Windows Server 2008 family
tls cafile

Registry HiveHKEY_LOCAL_MACHINE
Registry PathSoftware\Policies\Samba\smb_conf\tls cafile
Value Nametls cafile
Value TypeREG_SZ
Default Valuetls/ca.pem

samba.admx

Administrative Templates (Computers)