How to force "FTP" action to work though proxy server?

[Mike-7]

Allowed outbound FTP connections is not an option for our organization (our security department prohibits its). So please ask your vendor to provide support for ISA Server, or use a different vendor, or even consider developing your own code for FTP support (huh, in case when I'm not the only one who needs to use FTP in such way :). The problem is simple, at first glance - the IE supports ISA - why not to support it in Visual Builder?

Or maybe simplier solution would be to embed a support for 3rd party FTP client application (like reget), which provides support for ISA and invoke it through command line.