For NW7.4.4 (and I assume NW7.4.2
You need to configure each ESX host and each ESX client.
Each host will use 2 licenses and each client will be free (they use
the second license for the host).
You will need to install the networker client on each VM Instance.

VCB is better supported in NW7.6 and that may be an option for you.

Ken

On Wed, Jan 20, 2010 at 9:17 AM, Venkat Tudi <venkat.tudi AT gmail DOT com> 
wrote:
> Currently we are using VRANGER for backing up the VM instances uising VCB.
> We want to eliminate VRANGER and use only Networker for our Backups.
>
> We are on 7.4.2
>
> Here are my questions.
> Do I need to configure each client in the NW Server or Do I only configure
>  the ESX host in NWSERVER?
> If I configure each VM instance in NW do I need to install the NW client on
> the each VM instance? There are thousands of the instances.
>
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