This procedure is only required if the upgraded CMS server sends records to an ECH system. Skip this procedure if records are not sent to ECH.
ECH uses a public key file on the CMS server. The information in the file gets put in the authorized_keys file in the Home directory of the SFTP user on the receiving ECH system. This file is located on the CMS server at:
When the CMS server is upgraded through the CMS upgrade process on a Linux server, the upgrade changes the public key. Put the new public key file on the receiving ECH server so that the SFTP connection will work.