Everybody knows this warning. Now I show you how to change the vCenter Certificate to avoid this ugly page. For those who are completely new to this topic I suggest you to check out https://tenthirtyam.org/inf4529/index.html VMware vSphere has multiple components who own a Certificate. There are: ESXi Certificates Machine SSL Certificates Solution User Certificates Single Sign-On Certificates   We have four different options for doing Certificates in vCenter Server 6 VMCA (VMware CA) as root CA VMCA as Enterprise CA Subordinate Custom CA … Continue reading How to install a new Certificate for vCenter Server