When deploying Exchange Server 2013 or 2016 there are some best practices to be aware of for your namespace configuration.
How to export and import an SSL certificate between multiple Exchange Server 2016 or 2013 servers
Can you re-use the same SSL certificate from Exchange Server 2013 or Exchange 2010 for your new Exchange 2016 servers?
How to enable an SSL certificate to be used by Exchange Server 2016 for different services.
How to complete a pending SSL certificate for Exchange Server 2016.
Outlook may display a security alert with certificate warning messages after installing Exchange Server 2016 into your environment.
How to use the Exchange Admin Center to generate an SSL certificate request for Exchange Server 2016.
How to plan the SSL certificate requirements for Exchange Server 2016, request a certificate, and deploy it to your Exchange 2016 servers.
How to configure the Exchange Server 2016 Client Access namespaces using the Exchange Admin Center, PowerShell commands, and scripts.
How to renew an expiring or expired SSL certificate for Exchange Server 2013.