Unable to modify Group through SPML test page (193839)

Unable to modify Group through SPML test page

When attempting to modify a group via the SPML test page the following error is displayed:

Administration Policy returned an error. Attempted to perform an unauthorized operation

ASP.NET impersonation is not enabled on the SPML provider page within Internet Information Services (IIS)

Follow the steps below to ensure that asp.net impersonation is set on the SPML provider page

1. Open Internet Information Services (IIS) Manager on the SPML provider host
2. Expand the host name
3. Expand Sites
4. Expand Default Web Site
5. Left click on the "ARServerSPML" site
6. Click on "Authentication" in the middle pane
7. Ensure that ASP.NET impersonation is Enabled