First Look at Analysis Services 2005 - Professional SQL Server Analysis Services 2005 with MDX - page 55

Figure 2-17
6. In the Impersonation Information page you need to specify the imper-
sonation details as to how Analysis Services will connect to the rela-
tional data source. There are four options for you to select as shown
in Figure 2-18 . You can provide a domain user name and password
to impersonate or select the Analysis Service instance's service ac-
count for connection. If you choose the default option then the Ana-
lysis Services uses the impersonation information specified for the
database. The option User the credentials of the current user is
primarily used for data mining where you retrieve data from relational
server for prediction. Select the Use the service account option and
click Next.