SEPM agent fails to install on Win10 via MDT......installs fine manually

I'm using Symantec Agent 12.1.6 MP7 in my MDT Task sequence, which simply runs "setup.exe /s"

In the MDT logs, it shows that the app installed successfully with return code 0.  However, on the computer itself I see in the sidebar "Symantec Endpoing Protection doesn't work on this version of Windows."

Then I try to install it manually using the same command line and it works fine. 

I'm at a loss as to how to troubleshoot this, since no local Symantec logs are generated and MDT thinks it's working fine.  Is there anything I can try?