Hi,
In order to set permissions for a folder you can use the "Permissions" tab of the "Edit Folder" dialog:
http://www.advancedinstaller.com/user-g ... sions.html
However, since "IUSR_CompName" is an IIS account, the only way to set permissions for it it by using a custom action.
Note that the "IIS" page in Advanced Installer allows you do what you need through the "Authentication" tab:
http://www.advancedinstaller.com/user-g ... -auth.html
Using the "IIS" page you can set permissions for a folder, add it as a virtual directory and set these permissions for your custom user in the "Authentication" tab.
Regards,
Cosmin
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