Hello,
I am converting normal user mailboxes to linked mailboxes in Exchange 2007 SP3. After a pilot, we found that the linked accounts no longer had access to shared mailboxes (the share mailboxes will NOT be converted into linked accounts). The Full Access ACL references the OLDOMIAN\username AD account. Manually adding NEWDOMAIN\username to the ACL fixes things. Is there an easy way to export the Full Access and Send As permissions for the shared mailboxes and switch them to NEWDOMAIN\username with PowerShell? I have a feeling this will involve a lot data manipulation with Excel. Too bad there is no ADMT style security translation tool for Exchange mailboxes!