Blackberry Server /w Multple GAL's

Hi,

We have a new installation of Blackberry Server Express 5.0.3 going on a virtual machine we have and also we have Exchange 2010 SP1.

We are going through the process of creating a hosted exchange which works fine.

Each company has it's separate GAL and I have ran into slight issues that i was wondering if anyone has some insight.

To make this see the users I have a quick fix I done which was to add BESAdmin into Domain Admins which to be honest i'd rather not keep and all the users can see all users through all the companies we have.

Is it possible and it's fine if not cause i doubt the users will care if they can see the GAL or not, but is it possible to have say Company A just seeing company A contacts and Company B cannot see Company A's contacts.

thanks