When onboarding a new customer that uses DNS filter, we can deploy the DNS Filter agent via agent procedure. 

First, for the agent procedure to function, we need to save the site key in the Managed Variables: 

Get in the DNS Filter, under the right organization, Deployments -> Roaming Clients -> Install and copy the Site Secret Key

Then go to the VSA, Agent Procedure module -> Manage Procedures -> Schedule/Create -> Manage Variables 

Select the Variable called <DNSSecretKey>, enter the site key in the Variable Value field, select all org and machine groups for that customer and click Apply. 

You can then use the agent procedures on the windows workstations from that customer.