User.IsInRole Returning False Using Windows Authentication

Mar 15, 2010

My ASP.NET app is using windows authentication. If I run the following code:

WindowsIdentity wi = (WindowsIdentity)User.Identity;
foreach (IdentityReference r in wi.Groups)
{
ListBox1.Items.Add(r.Translate (typeof (NTAccount)).Value);
}
if (User.IsInRole ("Everyone"))
Label1.Text = "Is in role";

The listbox will contain the name of every group the user belongs to. If I then call User.IsInRole, and pass in the name of any of those groups, I always get a false.

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