Hi,

   Is there a way to hide all address lists from a user so that he could not see any in OWA and Outlook ? Is there a way to show a user only selected address lists in OWA and Outlook? I would be happy if i could do it using PowerShell .

I have googled and found some articles on it which mention msExchQueryBaseDN attribute to set (For OWA -  and for MS Outlook, process is long which includes settings ACL permissions using ADSIEdit tool) . IF I set this 'msExchQueryBaseDN' attribute to the DN of a GAL, then in OWA only that GAL is shown, All other Address Lists are invisible there. How to show other Address lists like All contacts, All users etc with a single GAL selected via msExchQueryBaseDN.

 I have read somewhere that in Outlook only one GAL is shown, if this is so then how to set that single GAL for a user to show in Outlook?

  best regards,