I have created a hosted Exchange service where Sys admins can manage Exchange through a control panel, creating users, adding OU's etc.
I have a problem however, where new users can see the Global Address List through OWA. How I intend to correct this is as follows:
1. Create a Universal security group for each Sub-OU and add all users in each sub-OU to this.
2. Add an address list and add the Distribution Security Group to this.
The above process will be done for each Sub-OU created. I am unsure however how to hide the Global Address List for these sub-OUs... which are all held in the container 'Hosted'. Any ideas?