Skype for Business on-prem without Exchange Hybrid - autodiscover configuration?

We completed a migration of all Exchange users to Office 365 several months ago, and we have one remaining Exchange Hybrid server. We have our phone system that is currently Skype for Business (planned to be replaced with Teams in 6+ months), and we want to get rid of the last Exchange server.

Exchange is currently providing autodiscover for S4B, and I am looking for guidance on what steps we need to do (and if it is possible) to re-point autodiscover to the S4B Front-End pool so that we can remove the last Exchange Server.

Any advice?