Web Service Consumers (SOAP) called by Lotus script agent needs NTLM authentication

I have created a SOAP Web Service Consumers (to an external non Domino web service) which I call from a Lotus script agent. To connect to the web service I need to do NTLM authentication, but I do not know how to do this. Does any one has some tips?

Subject: Functionality not available

NTLM Authentication with LotusScript Web Service is not currently available.

Enhancement request:
SPR # DPOL8NVKS7 WS: Functionality Should Be Provided To Consume Web-services Authenticated With Ntlm Using Lotusscript

Subject: FYI

We could suggest opening a pmr with us and having an engineer add your additional interest onto the existing associated enhancement request spr to add weight on it’s interest of being supplied as a feature in a new/upgraded release.

Subject: Mutual SSL?

Have you considered using mutual SSL? We have it running and have had no issues with it.