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Important This article contains information about how to modify the registry. Make sure that you back up the registry before you modify it. Make sure that you know how to restore the registry if a problem occurs. For more information about how to back up, restore, and modify the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756 How to back up and restore the registry in Windows
Windows Live ID sites and services authentication in Windows Internet Explorer 7 may not handle the "302 Found" status correctly.
WinINet does not treat the "302 Found" status as an authorization success scenario. This behavior is unlikely to cause problems for existing applications because the cookies that are associated with the successful authentication were previously set.
Microsoft Knowledge Base article 948608 explains that the "302 Found" status is not treated as a possible authentication success. In this scenario, the WWW-Authenticate header is replaced by the Set-cookie header for success. Therefore, the session-scoped credential persistence fails.
Security update information
To resolve this problem, install the most current cumulative security update for Internet Explorer. To install the most current updates, visit the following Microsoft Web site:
Note This fix was first included in security update 947864 (MS08-024). For more information, click the following article number to view the article in the Microsoft Knowledge Base:
947864 MS08-024: Cumulative Security Update for Internet Explorer
Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall the operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.
To resolve this problem in Internet Explorer, follow these steps:
Install the following Internet Explorer cumulative security update, or install a later cumulative security update:
944533 MS08-024: Cumulative security update for Internet Explorer
After you install the update in step 1, modify the registry to enable the update. To do this, follow these steps:
Click Start, click Run, type regedit, and then click OK.