SBS & Server Essentials

Hi All

I have a SBS 2008 Server that's my Primary DC and I want to make a Server Essentials 2019 a read only secondary domain controller, is this possible, given the fact that I can't have both on the same domain.

Side Note: I'm migrating to M365 and want to promote the Server Essentials 2019 after the migration and decommission the SBS.