AD security /SSRS security

IN SSRS, we have a AD new security group that has users with browser permissions. However when members in this group try to run reports we get this error..

The permissions granted to user 'DOMAIN\testit' are insufficient for performing this operation. (rsAccessDenied)

If we add these same members of the AD group individually with browser permissions, it works fine.  What are we missing on this AD security group?

SSRS is running on SQL2008
baytowelAsked:
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Adam BrownSenior Systems AdminCommented:
The AD group needs to have a Login and User principal added for it to function in SQL server. https://dba.stackexchange.com/questions/2572/how-do-i-assign-an-entire-active-directory-group-security-access-in-sql-server-2/2578 has a little more detail about how to do this and why.

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baytowelAuthor Commented:
Thank you, that is the step we missed.

Bay Towel.
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Microsoft SQL Server 2008

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