In order to update the cleint version on the other site, what you need to do is assign the pacakge to one group at a time and then push the package.
Else what you can do , Create a new group and place a small number of client computers in that group and then push the pacakge to them . once they get updated move them to the orginal group and then move new client in this group and update them
To migrate client software
- Log-on to the newly migrated Symantec Endpoint Protection Manager Console if you are not logged on.
- Click Admin > Install Packages.
- In the lower-left pane, under Tasks, click Upgrade Groups with Package.
- In the Welcome to the Upgrade Groups Wizard panel, click Next.
- In the Select Client Install Package panel, all existing client packages are listed in the drop down box. Select one of the following:
- Symantec Endpoint Protection <appropriate version>.
- Symantec Network Access Control <appropriate version>.
- Click Next.
- In the Specify Groups panel, check one or more groups that contain the client computers to be migrated, then click Next.
- In the Package Upgrade Settings panel, check Download client from the management server.
- Click Upgrade Settings.
- In the Add Client Install Package dialog box, on the General tab, specify whether or not to keep existing client features or specify new ones, then configure a schedule for when to migrate the client computers. Under the Notification tab, if desired, specify a message to display to users during the migration.
- If the clients in the group run a version of Symantec Endpoint Protection previous to MR3, turn off scheduling. Scheduling is on by default when a new client install package is added to a group. If scheduling is turned on, the upgrade fails. To turn off scheduling, in the Add Client Install Package dialog box, uncheck Upgrade Schedule.
- For details about settings on these tabs, click Help.
- Click OK.
- In the Upgrade Groups Wizard dialog box, click Next.
- In the Upgrade Groups Wizard Complete panel, click Finish.