HOWTO: Convert .crt file into the Microsoft .cer format

Source: https://support.comodo.com/index.php?_m=knowledgebase&_a=viewarticle&kbarticleid=808

-------------------------------------------------------------------------

Double-click on the yourwebsite.crt file to open it into the certificate display.

Select the Details tab, then select the Copy to file button.



Press Next on the Certificate Wizard.
Select Base-64 encoded X.509 (.CER), then Next.



Select Browse (to locate a destination) and type in the filename yourwebsite.
Select Next then Finished.

You now have the file yourwebsite.cer