Please confirm it is ok to remove the following records (SBS 2011 server has been removed) or do I point the IP of these records to the new WSE2016 server?
sites and _sites folder
companyweb
connect
SBSConnectComputer
SharepointSMTPServer
The companyweb, connect, SBSConnectComputer, SharepointSMTPServer can be removed. Without seeing the others I cannot tell but if you set scavenging on the DNS server they will disappear automatically.