Is it possible to change the automatic configuration script address in the LAN settings of Internet Explorer 8 with the help of a script?

You can use the following commands in a batch file (.bat file) Use of batch files relieves you from making so many UI clicks to perform a simple task of assigning a value to "Use automatic configuration script" text box in the internet options -> Advanced settings.

To use an automatic config script

reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings" /v AutoConfigURL /t REG_SZ /d "http://www.xxxxx.com:1234/sampleScript" /f

The result looks like:

To clear that field

reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings" /v AutoConfigURL /t REG_SZ /d "" /f

If you can use PowerShell:

Set the property

Set-ItemProperty -Path 'HKCU:Software\Microsoft\Windows\CurrentVersion\Internet Settings' -Name AutoConfigURL -Value 'http://www.yourdomain.com/config.pac'

Clear the property

Remove-ItemProperty -Path 'HKCU:Software\Microsoft\Windows\CurrentVersion\Internet Settings' -Name AutoConfigURL