We use MDT to deploy new computers in our company and I have found that if I run the Global Protect agent using the silent switch the install finishes but no virtual adapter is created and the VPN does not work. If I remove the silent switch so the install pops up then click next all the way through it install correctly and creates the virtual adapter. Upon watching it I notice that the virtual adapter is only created when clicking on the finish button at the end of the install not as part of the install process. Is there a reason for this? and does the silent switch trigger a different exit in the installer that misses that action?
It's a bug or something is going wrong in your case, many customer are using silent install for massive deployments without a problem.
you should open a TAC case
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