Hi, One way you could try is to '''Import''' it into the Personal\Certificates folder of [http://windows.microsoft.com/en-US/windows-vista/View-or-manage-your-certificates Windows certificate store] and then '''Export''' it as PKCS#12. You can also search for '''convert .cer to pkcs12''' in the Firefox [https://support.mozilla.org/en-US/kb/Search%20bar?s=search+bar&r=0&e=es&as=s Search bar] on the top right for many other options.