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 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:
Click Security > Trusted Roots.
Click the name of the trusted root.
On the Certificate Details page, click Export Public Certificate, then click the file type.
Save the output file.