Single sign on with Active Directory

[chris2001dc]

Hi,

I have a cognos 8.4 environment with connection to cubes from Analysis Services and Active Directory Authentication. I have configured security in the AS cubes with Active Directory so users can look only to specific information.

I want to set Single Sign-on so users do not have to type their credentials. I configured the namespace according to this document http://www-01.ibm.com/support/docview.wss?uid=swg21341889.
So I used this property
singleSignonOption = IdentityMapping
The single sign-on works, it opens cognos connection,  but when i want to run a report that has an Analysis Services cube as source an authentication page appers the credentials need to be valid for the cube.

Want should I do to pass the active directory credentials automatically to the cube?

Thanks,
Chris