The migration actions listed here are for the changes required when upgrading from Enterprise Developer 4.0 to Enterprise Developer 5.0.
The z/Server scheduler is no longer required in Enterprise Developer 5.0 as the MFA Server now supports z/Server functionality via the MFA TSO Application Server. If you are installing Mainframe Access Server 5.0 and all of your clients are running Enterprise Developer 5.0 then you do not need to configure the z/Server scheduler. Instead, you should configure the MFA TSO Application Server.
z/Server is now deprecated, and marked as such in the documentation. The only reason to configure the z/Server scheduler is if support for clients earlier than Enterprise Developer version 5.0 is still required. Micro Focus recommends that you keep all Enterprise Developer clients up to date and in sync with the Mainframe Access Server version.