How to view Exchange installed certificates in exchange management shell?
Simple run Exchange Management Shell an run the command: Get-ExchangeCertificate | fl

Verb: Services inform you with services use this certificate.
In my example this is IMAP, POP, IIS and SMTP services.

Useful links:

The OpenSSL Project: http://www.openssl.org/
OpenSSL for Windows: http://www.slproweb.com/products/Win32OpenSSL.html

 
We want to get an official SSL certificate from well-known public Certificate Authority (CA). We have to generate a certificate request, for example using OpenSSL.
 
Steps to request a certificate – to generate a CSR file (Certificate Signing Request)
1. Creating a private key
You need to create a private key [...]

Useful links:

New-ExchangeCertificate cmdlet on Microsoft Technet: http://technet.microsoft.com/en-us/library/aa998327.aspx
Get-ExchangeCertificate cmdlet on Microsoft Technet: http://technet.microsoft.com/en-us/library/bb124950.aspx
Import-ExchangeCertificate cmdlet on Microsoft Technet: http://technet.microsoft.com/en-us/library/bb124424.aspx

 
We need certificates to publish internal Exchange 2007 services (like OWA, ActiveSync, OutlookAnywhere) using Microsoft ISA 2006. We want to get a private SLL certificate from internal Certification Authority (CA). We have to generate a certificate request, for example [...]