If you already have a Windows PC with a set up certificate you can export it to a file for use on another device. In order to export the certificate you need to access it from the Microsoft Management Console (MMC).


  • An existing S/MIME cerfiticate added on your Windows PC

Export your certificate

  • Open the MMC (Start > Run > MMC).
  • Go to File > Add / Remove Snap In
  • Double Click Certificates
  • Select Computer Account.
  • Select Local Computer > Finish
  • Click OK to exit the Snap-In window.
  • Click [+] next to Certificates > Personal > Certificates
  • Locate and select the certificate for the correct domain.
  • Right Click and select All tasks > Export.
  • Press Next
  • Select Yes, export the private key.
  • Choose Personal Information Exchange - PKCS#12 (.PFX) for the certificate file format. Check the boxes for:
  • Include all certificates in the certificate path if possible
    Export all extended properties
  • Click Next.
  • Enter a password for your private key. Press Next.
  • Click browse and save your .pfx
  • Press Next > Finish > OK.