Load balance two STS servers and indicate the name of the VIP in PM

I'm using SCPM with a scenario based on STS authentication to Azure AD.

I have two STS servers, so I created a load-balanced IP address between the two machines.

How can I specify the virtual IP address in the workflow?

Because the One Identity Password Manager interface always redirects me to the server's hostname.

hostname:20000/.../login
replace with
https://vip:20000/RSTS/Login

Thank you.