2 rapid questions on Exchange 2007:1) How we can hide address lists to someone (in GUI and also with shell)?2) How we can deny to specific users sending mail to Internet (in GUI and also with shell)? thanks

....bump...... Really impossible???

This is how it works for GALs, but it should be the same for Address Lists: Follow these steps to provision recipients for global address lists: 1. Apply attributes to each group of recipients so that you can easily filter the groups when creating the GALs and modifying the permissions. For example, for each student's mailbox, add "Student" to the Custom Attribute 1 field. For member of the faculty and staff, add "Employee" to the Custom Attribute 1 field. 2. Create two GALs with the appropriate members. Using the Exchange Management Shell or the Exchange Management Console, create a GAL that contains students only and create a second GAL that contains all recipients. 3. Remove default permissions to the GALs. Using the Add-ADPermission cmdlet in the Exchange Management Shell, remove the default permissions on both GALs. 4. Add the appropriate permissions to the GALs. Using the Add-ADPermission cmdlet in the Exchange Management Shell, add the appropriate permissions to the GAL for each group.

with management shell the command is: Set-Mailcontact -Identity "contact_name" -HiddenFromAddressListsEnabled $true you can do for all contacts with this command: Get-Mailcontact -OrganizationalUnit "OU_name" | Set-MailContact -HiddenFromAddressListsEnabled $true bye