RP is set up to Pass-Through authentication, and can see new users being created with their windows username. However they are seeing an error "Login failed for user " occurring in folderView.aspx.
Current settings for RP :
"Settings/Security/Enable Pass-Through Authentication" = On
There is a role "Domain Users" which matches one all users are a member of. The role & its users are visible in "Admin/Synch Users".
Admin/Settings/OLAP Report "XMLA Proxy" is set to "Always Used".
IIS ReportPortal virtual directory has Anonymous Authentication = On as an admin level user, and Basic Authentication = On with domain specified.
The problem was that xmla.udl connected to ReportPortal database using Windows authentication and ReportPortal virtual directory was not using Anonymous authentication.
The problem was resolved my changing xmla.udl (C:\inetpub\wwwroot\ReportPortal\xmla.udl) to use SQL authentication instead.