Upgrade Clients to 8.1.1 Not able to use LiveUpdate because of the Certificates

LiveUpdate cannot handle the Certificates needed for NetBackup 8.1.1

How can we upgrade a large number of clients (RedHat Linux and Windows Server) with minimal effort? from 7.3 to 8.1.1..

IHAC that is using a lot of VM's and these need to be upgraded for a proper single file restore. They have the vSphere Plugin from NetBackup active. 

Do you know a method to do this without manually pushing the upgrades to each machine?