http://blogs.technet.com/andrew/archive/2008/04/28/big-dimensions-just-because-you-can.aspxOne of the limitations of Analysis Services in SQL Server 2000 (AS 2000) was that a member in a dimension could only have  64,000 children, which was removed in SQL Server 2005 (SSAS 2005). So now you can create a customer hierarchy for your 1 millionen-USCommunityServer 2.1 SP1 (Build: 61025.2)