Use the same ADFS Server for multiple On Premises Environment – Dynamics 365 for Finance & Operations On Premises Installation

According to the Microsoft documentation you should have an ADFS Server for each On Premise Environment.

As per my understanding, the reason is related to the workflowClientId that is an hard coded value in  the Publish-ADFSApplicationGroup.ps1 Powershell script.
Check my post as well.

Due to this reason, in order to use the same ADFS Server you have to add a new Host in the Application…