Sharing Content of Linked Mailboxes   

Hi!
My platform is as follows:
One server called SERVER1 is running Windows Server 2003 SP2, acts as a DC 
for domain DOMAIN1. Exchange Server 2007 (no SP1 installed yet) is running 
on this machine SERVER1.
Another server called SERVER2 is running Windows Server 2003 SP2, acts as a 
DC for another domain called DOMAIN2. No Exchange installed on this machine 
SERVER2.
There is a two-way transitive trust between DOMAIN1 and DOMAIN2. This is why 
I was able to set up the mailbox feature on the users belonging to DOMAIN2. 
It works fine: MAPI access, OWA, etc. As you may know, this is the Linked 
Mailbox feature of Exchange 2007.

However, there is still a thing I can't do: to share a Linked Mailbox with 
another mailbox, Linked or traditionnal.

I tried to use this PowerShell command:

Add-MailboxPermission "Mailbox" -User "Trusted User" -AccessRights 
FullAccess





It works fine for any normal mailbox (sharing Inbox, Calendar, etc.) but for 
a Linked Mailbox, I only manage to view the title in the left pane of my 
client Outlook 2003 SP3: Mailbox - John Smith (if John Smith is the user 
granting the full access to his Linked Mailbox).

My question is : Is it really possible to share Linked Mailboxes, and if 
yes, what am I missing?

Help greatly appreciated.
Nicolas

date: Thu, 1 May 2008 18:40:22 +0200   author:   Nicolas Macarez