How to configure proxy for out-bound webservice in Service Manager

We need to connect to a third party web service through a proxy.

We have configured sm.ini as explained here: (SM) Support Tip: How to configure proxy for out-bound webservice in Service Manager - Service Manager User Discussions - OpenText Service Manager (microfocus.com)

But we have identified that requests are not passing through proxy.

We need to know the reason and how to do that.

Thanks!