This article provides guidance on how to set the Symantec Management Agent (Sym Agent, SMA) communication to use TLS 1.3.
ITMS 8.x
To configure TLS , in the SMP Console you would need to open Settings > Agents/Plug-ins >Symantec Management Agent > Symantec Management Agent Communication profiles. Then select SSL certificates are defined for current profile > Edit and select the versions which you want to use:
For verification, in the Sym Agent properties, you can you can go to the Agent Settings tab and look under Persistent Connection or Non-Persistent Connection for the connection status: