Supported Security Types:
1) Anonymous – everyone sees the same data. No authentication needed.
2) Windows Integrated – Windows Domain Controllers are authenticating the users. Not suitable for the Internet where Windows Domains are not commonly used.
3) Custom Security (ASP.NET Membership or other) – Role or User based custom security commonly using relational database tables for looking up security data. Most common for the Internet deployments. SSAS built-in security model is used.
4) External-to-SSAS security – a variation of 3) but SSAS built-in model is NOT used. The security is handled outside SSAS.