Hi All, I am on a corporate domain. We are currently attempting to deploy a company-wide proxy. The proxy is hosted externally outside our network. The proxy is plugged into our active directory to automatically authenticate users. The Proxy works fine on XP machines. But when I try it from windows 7 machines it asks for a username and password. I have tried anything it could possibly be from our active directory as well as an admin account for the proxy itself. This should not even present itself and those hosting the proxy have not used active directory integration before. Any ideas are appreciatedRegards Sebastian Burrell MCP, MCTS

1. Would you give more info on how it works with Windows XP? What is the level of AD? W 7 is more secure and the number of possible parameters to sen is higher (outgoing firewall, UAC,...) 2. Any logs, either local, server and from network monitor? 3. If the proxy is third party, then address the their support forum Regards Milos

Take a look into LAN Manager authentication levels. Windows XP defaults to LM & NTLM responses whereas Windows 7 defaults to NTLMv2. Something like "Send LM & NTLM - use NTLMv2 session security if negotiated" is a reasonable compromise and should get your proxy authentication working. The setting is tucked away under Local Policies\Security Options. - Jason

Take a look into LAN Manager authentication levels. Windows XP defaults to LM & NTLM responses whereas Windows 7 defaults to NTLMv2. Something like "Send LM & NTLM - use NTLMv2 session security if negotiated" is a reasonable compromise and should get your proxy authentication working. The setting is tucked away under Local Policies\Security Options. - Jason

Hi Jason, Thank you yes that it what it was the policies that need to be set are as below it was win 7 being 'too secure' :DRegards Sebastian Burrell MCP, MCTS

Also I Have set up GPO's on the server to put this out to the clients and is configured as follows for those who wish to know: Regards Sebastian Burrell MCP, MCTS