The SBS server was rebuilt.
When doing the intial setup, the SBS setup was postponed, in order to join the domain and transfer FSMO roles GC to the would be SBS server from the previously secondary DC.
Now I resumed the SBS setup portion of the server, and when I try to install Exchange, it says that the server exists in the first storage group already and to perfrom a install with /disasterrecovery option.
When I do this, it asks for the Product Key, which I do not have, as this is SBS intergrated.
Is there another way to launch Exchange setup from SBS discs with the /disasterrecovery option ?