I have found the following tips to be helpful when transitioning to Server 2019 from older server platforms.
Microsoft Server 2019: No window border/allwhite issue – Dybbugt.no – use these keys to change the no border on a window in Server 2019. Especially if you use Servers for Remote Desktop, putting the edge back on the window helps the usability.
Ensure that you deploy LAPS – Local account password solution – Enabling Microsoft “Cloud enabled LAPS” (Local Admin Password Solution) – Dybbugt.no
CIS Benchmarks – recommended hardening guidelines – CIS Benchmarks (cisecurity.org)
Susan Bradley Patch Lady/Prudent patcher