Restore Process
Setup new server using OVA Install the same Windows OS Ensure the hostname of the new server matches the name of the old server Restore the CUACA crypto keys including aeskey.dat - these need to be taken from the live publisher by clicking Help / Export Crypto Key File otherwise you will not be able to restore the databases onto the restored server as it will complain of a crypto key failure in the logs Install the same version of CUACA
extra step outlined here
http://squirrelsuccess.blogspot.com/2018/06/restoring-cisco-unified-attendant.html