Symantec endpoint protection definitions not updating
You may need to change the delivery method to support different client platforms, large numbers of clients, or network limitations.
About Rapid Release virus definitions Several times a day, Symantec Security Response compiles all new detections into a new Rapid Release virus file.
To help mitigate the effect of downloads on network bandwidth, download content randomly so that not all clients get updates at the same time.
See About randomization of simultaneous content downloads.
See Choose a distribution method to update content on clients based on the platform.
If the management server receives too many concurrent requests for full definition packages from the clients, the network may become overloaded.