Steps to download and install the digital certificate.
Open your web browser to https://aap.adobe.com.
Your browser might prompt you to present a digital certificate at this point. If it does, just click Cancel to dismiss the dialog box.
On the login screen, enter the Account Name and the Password that you received from Adobe, then click login.
Locate the certificate that has been issued for your instance of Report Server (Your Name.pem) and click the icon associated with that certificate.
When prompted to save the certificate, click Save.
Download the file to the Certificates folder in the directory where you installed Report Server.
This folder already contains a certificate file named trust_ca_cert.pem. Both certificate files must always be present for Report Server to function.