Connecting the Data Source with a different user

Hi All ,

I have a report that using MDX to retrieve data from a cube (SSAS 2008 R2) . This cube have 2 roles regarding to Dimension Data, for the windows authentication users : 1) For Admin who can browse all branches . 2) For a test user who can browse only one branch .

When the report is running by the test user, I see only one branch (which is correct) . I would like to let the test user watch all branches for that specific report . How can I achieve it ?

Any help will be appreciated .

Regards, David .