Auto trust certificate on command line

Hello,
May I know is there a switch to bypass the below cert trust msg when running on batch mode? Thanks for help.

---------------------------------------------------------------------------------
If you trust this certificate, press Yes. To connect without storing certificate
, press No. To abandon the connection press Cancel.
Continue connecting and store the certificate?
(Y)es, (N)o, C(a)ncel (10 s), (C)opy Key: Yes
---------------------------------------------------------------------------------

Background:
Using Winscp ftpes to connect Windows IIS FTP server which enabled SSL

Command:
open ftpes://user:pw@server_ip/ -certificate=""xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx"""

Do I understand right, that you have solved your problem yourself?