This enhancement involved a behavior modification to the Basic Authentication filter. This fix corresponds to specific versions of Access Manager, as follows:
Access Manager 7.0 series from patch 5 forward
Access Manager 7.1 series from patch 1 forward
Support is now provided for using Policy Agent and Access Manager in conjunction with Microsoft IIS 6.0 Basic Authentication. For more information on Agent for Microsoft IIS 6.0 see Sun Java System Access Manager Policy Agent 2.2 Guide for Microsoft Internet Information Services 6.0.