We are offering hosted Exchange services and are in an Microsoft Exchange 2010 only environment with a Windows Server 2003 Domain Controller.
My problem is that all the customers have access to the GAL, which contains....all the customers. We obviously do not want that, but I have no idea on how to :
- Restrict access to the Global Address List to only me and my fellow administrators
- Create a Global Address List for each Organizational Unit and restrict access to it to the designed Organizational Unit
- We have also created regular Address Lists for each OU but all the customers also have access to these.