Symantec Endpoint Protection Upgrade 14.2 To 14.3

Follow this sequence to ensure a smooth transition across your infrastructure. 1. Upgrade the Manager (SEPM) Always upgrade the management server before the clients. Disable Replication:

Before starting the installer, ensure your environment meets the new 14.3 requirements. System Requirements

Choose the 14.3 installation package and specify the target group. symantec endpoint protection upgrade 14.2 to 14.3

SEP 14.2 (any RU) → SEP 14.3 (latest RU)

If using an external Microsoft SQL Server, ensure it is SQL Server 2012 SP4 or higher. SQL Server 2019 and 2022 are fully supported. Follow this sequence to ensure a smooth transition

Never skip this step. If the upgrade fails, a backup is your only safety net.

| Setting | Recommendation | |---------|----------------| | Stagger upgrade | 10-20% of group per day | | Allow rollback | Keep 14.2 cache until 14.3 verified | | Reboot handling | Suppress reboot, notify user | SQL Server 2019 and 2022 are fully supported

The SEPM system account lacks rights, or the remote client has no admin share. Fix: Use the "Client Deployment Wizard" to specify a domain admin account. Alternatively, switch to the Logon Script or Email deployment method instead of push.