You're looking to download Symantec Endpoint Protection Manager 14.3. Here are the steps and information you might find helpful:
: Click on My Entitlements in the left-hand panel. Use your serial number or Site ID to locate your specific product. symantec endpoint protection manager 14.3 download
and officially dropped support for Windows Server 2012/2012 R2. Broadcom TechDocs Post-Installation: Client Deployment SEPM_14
SEPM_14.3.0_Trial_Install.exeSymantecEndpointProtection_14.3.0_All_Clients_CS.zip (for Chinese/Japanese)Symantec_Endpoint_Protection_14.3.0.1_Full_EN.iso