Setup SSL for existing HTTP SharePoint web site.
1. SelfSSL, Entrust -> assign certificate
2. If only SSL is required, then drop current IIS website ONLY
3. If multiple websites require SSL on same server, use multiple IPs
4. Alternate access mappings:
https -> https
http -> https
5. Also note F5 is used to offload SSL.
6. Once SSL is configured setup required AAM's and re-configure search settings.