Samba: Failed to join domain: failed to lookup DC info for domain 'EXAMPLE.COM' over rpc: Access denied

Issue

• Samba: Failed to join domain: failed to lookup DC info for domain 'EXAMPLE.COM' over rpc: Access denied
• net ads join failing with below error.

Substituting charset 'UTF-8' for LOCALE
cli_negprot: SMB signing is mandatory and the server doesn't support it.
failed negprot: NT_STATUS_ACCESS_DENIED
libnet_Join:
    libnet_JoinCtx: struct libnet_JoinCtx
        out: struct libnet_JoinCtx
            account_name             : NULL
            netbios_domain_name      : NULL
            dns_domain_name          : NULL
            forest_name              : NULL
            dn                       : NULL
            domain_sid               : NULL
                domain_sid               : (NULL SID)
            modified_config          : 0x00 (0)
            error_string             : 'failed to lookup DC info for domain 'EXAMPLE.COM' over rpc: Access denied'
            domain_is_ad             : 0x00 (0)
            result                   : WERR_ACCESS_DENIED
lang_tdb_init: /usr/lib64/samba/de_DE.UTF-8.msg: File or directory not found
Failed to join domain: failed to lookup DC info for domain 'EXAMPLE.COM' over rpc: Access denied
return code = -1