Hi all,
I’d suggest going about it the other way around : instead of pointing everyone’s Dynamo to a network location, look deploying the packages from a network location to everyone’s PC.
We do this at work using a logon script that simply robocopies from \\networkFolder\...\ to %appdata%\Dynamo\DynamoRevit\1.3\packages\ for example. This works a lot more reliably than pointing to network location.
You can set flags to overwrite the folders if they exist, so everyone is on same versions for the packages you’re rolling out. No DLL security problems this way, plus it still lets people install their own packages locally on top of the deployed ones 
#lowtech
Yes, there’s more network traffic but i’ll happily make that tradeoff for stability & predictability.