Symantec Endpoint Protection Small Business Edition (SEP SBE) cloud uses LiveUpdate to upgrade the cloud and the endpoint protection agents on workstations and servers. There also multiple methods for manually updating agents if required.
Server upgrades are handled independently of workstations and often require manual intervention.
Workstation upgrades are independent of server upgrades and tend to happen more frequently.
Workstations get the latest antivirus, policy, and agent upgrades automatically. However, you can use LiveUpdate to force the workstations to update using the Check for Updates menu option in the notification area of the agent. This option is useful when an agent has been offline for a considerable period of time.
The upgrade does not require any user interaction, but it may prompt for a computer restart.
Use any of the manual methods available to upgrade if you don't have the latest agent.