All, I will be upgrading to 9.5 in the coming weeks. We will upgrade the existing DB but install a new Core. In the past, in order to get existing clients reporting into the new core, we just updated the old Core Server's DNS record in AD with the IP of the new core, copy over the certs and everything worked as it should until we got the clients updated (which usually takes a very long time). Just wondering, when building the new clients, instead of using the core server's name (fqdn), could I just use an application alias at that point. Then, as I go through upgrades moving forward, I'm not changing the Old core server's DNS entry, but an entry in our Non-AD DNS environment. That way, the old Core server and associated DNS entries can be removed from AD entirely.
Core Server Name: Server1.ad.somedomain.com
DNS Application Alias: LANDeskCore.somedomain.com
All clients send scans, etc to LANDeskCore.somedomain.com
One year later, If we go through another upgrade or hardware refresh, all I do is update LANDeskCore.somedomain.com with the new core IP.