Surface Area Configuration for Features (Anonymous Connections) - Analysis Services
Anonymous connections allow unauthenticated users to establish connections with Microsoft SQL Server 2005 Analysis Services. Unless your applications require unauthenticated users to connect to the instance, disable anonymous connections.
By default, Analysis Services disallows unauthenticated users from establishing a connection to the instance. Enabling anonymous connections to the instance is strongly discouraged, but it can be enabled by using SQL Server Management Studio to change the value of the RequireClientAuthentication server configuration property to 0 or by using this dialog.
Enable anonymous connections
If checked, unauthenticated users can connect to Analysis Services.
For more information about securing connections to an Analysis Services instance, see Securing Client Communication with an Analysis Services Instance in SQL Server Books Online.