Using EffectiveUserName To Impersonate in SSAS
It's common to implement your role-based security in your Analysis Services cube. That way Fred can only see the sales from the east region, but Frank can only see sales from the west region. Role-based security requires connections to your cube identify the end user so the cube can secure itself. One way of tackling this is to implement Kerberos so that the credentials of the end user pass from the end user's laptop, to the report server, to the cube.