If you want to use third-party distribution tools to update managed clients, you must configure the client group's LiveUpdate Settings policy to allow it. You can choose whether to disable the ability of client users to manually perform LiveUpdate.
When you are finished with this procedure, a folder appears on the group's client computers in the following locations:
Vista and later operating systems
drive:\ProgramData\Symantec\Symantec Endpoint Protection\CurrentVersion\inbox
Pre-Vista operating systems
drive:\Documents and Settings\All Users\Application Data\Symantec\CurrentVersion\inbox
To enable third-party content distribution to managed clients with a LiveUpdate policy
In the console, click Policies.
Under Policies, click LiveUpdate.
On the LiveUpdate Settings tab, under Tasks, click Add a LiveUpdate Setting Policy.
In the LiveUpdate Policy window, in the Policy name and Description text boxes, type a name and description.
Under Windows Settings, click Server Settings.
Under Third Party Management, check Enable third party content management.
Uncheck all other LiveUpdate source options.
In the Assign Policy dialog box, click Yes.
Optionally, you can cancel out of this procedure and assign the policy at a later time.
In the Assign LiveUpdate Policy dialog box, check one or more groups to which to assign this policy, and then click Assign.