Current setup: One AD domain with one ADFS server, and one ADFS proxy server. This ADFS setup is used for employees with an email domain of abc.com to access CRM. We would like to setup AD authentication for other employees in our company to access a different application, and their email domain is cde.com. The current ADFS server is setup with a certificate for the abc.com email domain.
My question is should I build an ADFS connection on the current server with cde.com, should I build an additional server and create an ADFS farm, or should I build an additional server but not in a farm (since the email domains are different)?