Hi,
This Video will demonstarte how to use Auto upgrade feature to upgrade existing SEP clients.
Auto upgrade feature is available only in Enterprise Edition
About SBE
Your Symantec Endpoint Protection Small Business Edition clients will upgrade automatically once the Symantec Protection Center has been upgraded. No further action is required on your part to complete the upgrade process
If you would like to manually upgrade the clients to the latest version please see:
Reference: http://www.symantec.com/docs/TECH97535
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Note: Auto-upgrade will update as many clients as possible based on download randomization and heartbeat intervals.