This article was previously published under Q251404
Important This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:
256986 Description of the Microsoft Windows Registry
You cannot post any data to non-NTLM authenticated Web sites.
This issue can occur after you visit an NTLM authenticated folder.
Note Microsoft Internet Explorer requires NTLM authentication for all visits after you visit one NTLM authenticated folder.
Warning If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.
To resolve this issue from the client side, use Registry Editor (Regedt32.exe) to add a value to the following registry key:
Microsoft Internet Explorer 6.0, Windows Internet Explorer 7, Windows Internet Explorer 8, Windows Internet Explorer 9, Microsoft Internet Information Services 5.0, Microsoft Internet Information Services 6.0, Microsoft Internet Information Services 7.0, Microsoft Internet Information Services 7.5