Adobe Root CA certificate expiration & Reader Extended PDFs

Are you trying to enable the commenting for reader-enabled PDF in Acrobat and getting the error message ‘’This document could not be reader enabled’’?

Adobe leverages a PKI (public key infrastructure) to issue digital certificates for licensing and feature enablement. Adobe-issued certificates under the Certificate Authority (CA), ICA and EE are scheduled to expire on January 7, 2023. It will lead to the expiration of all certificates issued under this certificate authority.

Reader Extended PDFs from Adobe Acrobat

Adobe Acrobat uses a certificate issued by 'Adobe Root CA' to sign Reader Extended PDFs. This certificate can no longer be used to create new Reader Extended PDFs post its expiry on January 7, 2023.

With the November 2022 update of Adobe Acrobat (Continuous and Classic track) creates Reader Extended PDFs using a new certificate issued by ‘Adobe Root CA 2’. Adobe recommends users update to the latest version of Acrobat (November 2022 update or later) to continue using this functionality post-January 7, 2023.

Please update the application to the latest version and reboot the computer once. Go to Help > Check for updates.

You may also download the patch manually from the link https://www.adobe.com/devnet-docs/acrobatetk/tools/ReleaseNotesDC/index.html

For known issues with Adobe Acrobat and Reader DC, please refer to the following document: Known issues | Acrobat DC, Reader DC 

To know more about the recent release version, please go through the page Acrobat Release Notes