I have a web app that is hosted on Windows Server 2003 R2, and is configured for SSO. Part of the configuration is to disable anonymous access on one of the app's virtual directories. The app (& SSO) work great for WinXP clients, but Win7 clients are having some sort of authentication issue. I can re-enable anon access on the virtual directory, and the Win7 clients can once again connect, but SSO no longer works. Is there something on the Win7 clients that I can configure to make this connection properly?

Please change the default NTLM authentication in Windows 7. Open gpedit.msc from Start Search box. Then locate to the following policy. Computer Configuration\Windows Settings\Security Settings\Local Policies\Security Options\Network security: LAN Manager authentication level Change “Send LM & NTLM - use NTLMv2 session security if negotiated”.Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.