You can export a trusted root or a public key certificate to a file so that a client can use it to verify the certificate chain sent by a cryptography-enabled application, or to have a backup copy of the file.
You can export the certificate in the following formats:
DER-encoded (.der) to a file.
PEM-encoded to a file. This is a Base64-encoded DER certificate that is enclosed between the BEGIN CERTIFICATE and END CERTIFICATE tags.
PEM CUT/Paste Buffer. This displays the certificate data so you can copy it to the system Clipboard. You can then pasted it directly into a cryptography-enabled application.
To export the public certificate:
On the Home page, click Certificates.
Click the certificate name.
On the Certificate Details page, click Export Public Certificate, then click the file type.
Save the output file to the location of your choosing.