- Check the database replication on the old publisher using the Run the utils dbreplication runtimestate.
- Backup the DRS on the old publisher, including the subscribers CUCM and IMP, shutdown the three nodes.
- Install a new publisher with the same network settings and security password.
- Add the new subscriber and IMP to the new publisher Under System > Server. For IMP (uncheck the High Availability box).
- Install the new Subscriber CUCM and IMP with same network settings. From the new Publisher node, restore the DRS Backup of the publisher and subscribers including IMP Nodes.
- Reboot the new publisher first and then subscribers.
- Check the database replication on the new publisher using the utils dbreplication runtimestate.
Demystify and Simplify 