HOW TO CONFIGURE A PROXY SERVER URL AND PORT USING GPP REGISTRY ?

Here are the steps on adding a ProxyServer url and Port using Group Policy Preference Registry settings.

Requirements: GPMC.MSC Editor

• From User configuration / Preferences / Windows Settings / Registry
• Right click on the Registry item and select Registry Item

• From the New Registry Properties, set the Action to create if the value we are adding for your proxy does not exist.

NOTE: Adjust the Action option bases on your needs.

• Set the Hive location and Key Path.

In our scenario, we are setting the following:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings ProxyServer entry

"ProxyServer"=https://proxy.contoso.com:9500

• If applicable, from the Common tab, you can select what actions to take with this GPP Registry setting.  

• Click Apply and OK to commit the changes.

Here is what it looks like, once it is configured:

That is all, once you have defined this GPO and your Domain replication is completed or use GPUPDATE /FORCE from the client to see if this setting have come down, you are done!

Considerations:

• If you want to apply these settings to your machines (computers), you will need to implement the Security Zones: Use only machine settings group policy.
  • REF: https://gpsearch.azurewebsites.net/#673
• If you want to push both User and Machine settings you would want to Configure user Group Policy loopback processing mode  
  • REF:https://gpsearch.azurewebsites.net/#348 / https://technet.microsoft.com/en-us/library/cc978513.aspx

For references to GPO Location, use the online GPO Search Engine: https://gpsearch.azurewebsites.net