If you obtained a digital certificate from a certificate authority, you can create a PFX file using that certificate and Microsoft Internet Explorer 7 or later.
Note:
If you created a self-signed certificate using a software program such as Adobe Reader, it is likely that the program created the certificate in a PFX file. If this is the case, you don't have to create another PFX file. You can use the one you have.
To create a PFX file with Microsoft Windows Explorer 7 or later:
- Ensure that your digital certificate is saved on your computer.
- Open Microsoft Internet Explorer.
- From the Tools menu, click Internet Options and then click the Content tab.
- Click Certificates.
- In the Certificates dialog, click the tab that contains your digital certificate and then click the certificate.
- Click Export.
- Follow the steps in the Certificate Export Wizard. For assistance, refer to the documentation provided with Microsoft Internet Explorer.
- When prompted, select Use DER encoded binary X.509 as your export file format.
- When prompted, save your certificate as part of a PFX file to an accessible location on your computer.
After you create your PFX file, you can use it to sign PDF documents.