Hello NZdude,
Agreed with Mick.
It is always recommended to have the Latest updated Security.
In your case, you simply have to Migrate the SEPM to the Latest Version of Symantec Endpoint Protection 11.0.6300 (RU6 MP3) by:
1) Downloading the Latest version of Symantec Endpoint Protection 11.0.6300 (RU6 MP3) from https://fileconnect.symantec.com
2) Migrate the Symantec Endpoint Protection Manager 11.0.6200 to the Latest Version of Symantec Endpoint Protection 11.0.6300 (RU6 MP3) by Following the Article below:
Migrating to Symantec Endpoint Protection 11.0.6300 (RU6 MP3)
http://www.symantec.com/business/support/index?page=content&id=TECH155655
3) Autoupgrade the Symantec Endpoint Protection Clients by following the steps below: (these steps provided below are also included in the Article provided above)
Upgrading the Symantec Endpoint Protection clients
The easiest way to migrate Symantec Endpoint Protection clients is by using the auto-upgrade feature. All other client software deployment methods are supported, but the auto-upgrade approach is the easiest way. The client migration installation can take up to 30 minutes. It is recommended to migrate when most users are not logged on to their computers.
Note: Test this migration approach before rolling out migration to a large number of computers. Create a new group and place a small number of client computers in that group for testing purposes.
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- Log on to the newly migrated Symantec Endpoint Protection Manager Console.
- 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, specify a message to display to users during the migration.
- 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.