I have a cube with the following structure:

Dimensions:
Clients (parent-child with several levels of clients,
with entry data at all levels)
Account Managers
Articles
Time

Measures:
Sales


Every Client has only one Account Manager. Clients below
the given node in the Clients hierarhy may have
other Account Managers.

I need a calculated measure that for a given
Account Manager sums all sales over all clients
below the ones where he is entered as Account Manager
(even though those below may have other Account Managers).

I have tried the following:

sum(
Descendants([Clients].CurrentMember,,LEAVES),
([Account Managers].[All Account Managers], [Measures].[Sales]))

Aside from being slow, it return values for every customer.
I only want the value for those clients where
who have the selected Account Manager.

Help is welcome!

Regards,
Mario