When configuring and deploying Symantec Threat Protection appliance, you get a warning in vSphere Web Client:

Warning message displayed : "Network Security Service is Not Running."

As per the new VMWare licensing, default NSX license provides AV Only support and not Network Security. Due to the AV Only support, you can not do “Host Preparation”, which is mandatory step to enable Network Security Service. Hence you get the warning message that Network Security is not running.

This apply to NSX for vShield Endpoint (AV only)

This Warning message does not affect the Anti Virus / Malware functionality of the product. This warning can safely be ignored.