In order to use PaperCut’s internet charging/quota features you need to make sure that your Proxy Server is configured correctly. This is the most complicated part of deploying PaperCut Internet Charging. Once your proxy is configured correctly, there is very little else that needs to be done, and PaperCut will charge users seamlessly.
I’ve written a guide to help troubleshoot proxy configuration issues in our knowledgebase .
This will hopefully provide some insight into how PaperCut internet quotas work with proxy servers and allow users to configure their proxies correctly.
Appendix 2 of our user guide also contains a step-by-step guide to configuring Microsoft ISA Server 2004 for use with PaperCut Internet Charging .