If you plan to replace the default certificate and key with a certificate and key from a certificate authority, ensure that your environment has the required software installed.
Your environment does not have to meet these requirements if you use self-signed certificates.
Microsoft CA (2000 or higher), with Web Server template
Microsoft Visual C++ 2008 Redistributable Package (x86) installed on the system where you will generate the certificate-signing request
OpenSSL 0.98r or higher installed on the system where you will generate the certificate-signing request
Putty or other SSH client (recommended)
WinSCP or other SFTP/SCP client
vCenter Server
ESXi 5.1 or later