Ok i found a “solution” …
I made 2 Trees with different settings.
The first one is Invisible but cast a moving shadow and the second one i visible but has only its indirect shadow.
Voila correct exposure of the tree with moving shadows. 
Ok i found a “solution” …
I made 2 Trees with different settings.
The first one is Invisible but cast a moving shadow and the second one i visible but has only its indirect shadow.
Voila correct exposure of the tree with moving shadows.