If you’ve ever needed help figuring out how to generate a Certificate Request within the Exchange Management Shell, I have good news. DigiCert has provided a wizard which will provide you with the Powershell command necessary to generate a CSR for a UCC Certificate.
Click HERE to get to the wizard.
First fill out the Certificate Details, an example is shown below, and then click Generate.
After you click Generate, you custom Powershell command for generating the UCC CSR is displayed. Simply copy this text into the Exchange Managment Shell and execute.