Now, it is time to install SSL certificate on Microsoft Exchange 2013 / 2016.First, download the ZIP file which contains the SSL (your_domain_name.cer) and Intermediate CA certificate.Essentially, Exchange 2016 is sized the same as an Exchange 2013 multirole server but requires additional compute resources.See here for more information: Check that your clients are supported.It is common that they may be more than one certificate listed in the display – if that is the case, find the in the field ‘Not After‘ – as this defines when each certificate becomes invalid/expired.
The default self-signed Exchange 2010 certificate is valid for a period of 5 years.
System requirements can be found here: https://technet.microsoft.com/en-us/library/aa996719(v=exchg.160)
Have a read and make sure that you meet these requirements. This ensures that you have enough RAM, CPU and storage resources available for your server to perform correctly.
After creating the CSR in MS Exchange 2013 / 2016 server, you should purchase a UCC SSL certificate to your Microsoft Exchange Server 2013 / 2016.
You need to submit your generated CSR during configuration process; CA will issue your certificate via email after confirming your request for the certificate.