We have a number of Windows 2012 VMs running on ESX.   

We are standing up new Windows 2022 server VMs to house the data on these VMs.   The goal is to swing Datastores from the old VMs to the new VMs.   Except for the OS, the VMs will be setup identically.

Now, the Commvault backups for this data has been on unlimited hold since the dawn of time.   The servers themselves hold a grand total of about 100TB of files.    One AUX copy of the backup data is about 1PB in size.    I don’t want to add any more to this unlimited hold data copy.    

If I keep the Commvault node name the same, can I avoid another full backup event for this data?   Or will the unique system identifier foil my plan?    I want it to back each server up incrementally on the first pass. (backing up only changed/new files).   

Whaddaya think?

Thanks!