The other day I had to look at performing a mailbox export in an exchange environment that used child domains, the exchange servers were in the top level domain and users in a child domain.
The usual get-mailbox command would not work form me as it was only searching the TLD.
After a bit of searching I found the –IgnoreDefaultScope option however this still refused to work for me, I kept getting:
So I found the Set-ADServerSettings command:
Set-ADServerSettings –ViewEntireForest $True
After that commands worked a treat!
Hope it helps
