Create a new custom client installation configuration
Open the Symantec Endpoint Protection Manager console.
On the Admin Tab, under Tasks, click Install Packages.
The current default client installation packages appear on the right.
Under View Install Packages, click Client Install Settings.
Under Tasks, click Add Client Install Settings.
Specify the name you would like the custom Client Install Settings to have.
Give the custom Client Install Settings a description.
Select an installation type from the following:
Select Silent (No user input or display) here..
Click OK.
Create the new custom install package
In the Symantec Endpoint Protection Manager console, on the Admin tab, under Tasks, click Install Packages.
The current default client installation packages appear on the right.
Under View Install Packages, click Client Install Packages.
Under Tasks, click Export Client Install Package.
Browse to or create a preferred export folder, and select it.
Select whether or not you want to create a single .EXE file. Unchecking single .EXE will export mutiple files, including an *.MSI installer file.
Under "Pick the customized installation settings below", from the drop down menu, select your custom Client Install Setting(The name which we given in previous step.).
Choose "Export a managed client", then select the group to which the client will be installed. If no group has been created, select the Default Group. It is recommended to leave "Add clients automatically to the selected group" checked.
Select the Preferred Policy Mode. The default is Computer mode.
Click OK.