I dont have a process document but these are the basic steps:
Navigate to CUCM/CUCN/IMP OS administration
Navigate to Security -> Certificate Management
Click Find and select the tomcat.pem cert and click Download.
Upload this cert to the Expressway.Maintenance ->Security certificates ->Trusted CA certificate.
Repeat this process for all servers.
Navigate to Maintenance ->Security certificates -> Server certificate.
Click on SHow Pem file and copy the contents into a text file. Rename the extension of this text file to .pem and upload it back to the tomcat trust section of each of the applications.
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