This q is similar to: http://serverfault.com/questions/39070/how-to-move-exchange-2003-mailbox-or-store-from-2003-to-2007-on-separate-networks

Basically I am trying to move our exchange mailboxes over to a test domain that is hosting EBS2008 with Exchange 2007. We plan to move as soon as we can when we have our exchange data over.

I have tried moving a db with mailboxes over but cannot get it to mount in the new Exchange in any way possible, including mounting it onto a recovery store. From my understanding the ONLY prerequisite for moving Exchange DBs across is that it must have the same Organizational name (unlike previous versions of Exchange). If anyone has any insight as to why I cannot mount and simply reattach the mailboxes, please give me an idea as to what could be wrong. It should be as simple as this. Note that the DBs I have are in a clean state.

I cannot use ExMerge because I am not running any mailboxes on 2003.

I have also tried using a 32bit Vista machine with the Export-Mailbox cmdlet to extract mailboxes but anything I do to it results in Permission errors. I have tried to troubleshoot these with no success. I am running in full admin with proper exchange roles and yet it still gives me access denied errors:

Export-Mailbox : MapiExceptionNetworkError: Unable to make admin interface conn
ection to server. (hr=0x80040115, ec=-2147221227)

Also some errors show in the management console:

get-MailboxDatabase
Completed
Warning:
ERROR: Could not connect to the Microsoft Exchange Information Store service on server TATOOINE.baytech.local. One of the following problems may be occurring: 1- The Microsoft Exchange Information Store service is not running. 2- There is no network connectivity to server TATOOINE.baytech.local. 3- You do not have sufficient permissions to perform this command. The following permissions are required to perform this command: Exchange View-Only Administrator and local administrators group for the target server. 4- Credentials have been cached for an unpriviledged user. Try removing the entry for this server from Stored User Names and Passwords.

Why I have to use a 32bit machine to export a simple .pst file is beyond me...

So yeah I am now out of ideas and any help would be great! Thanks in advance.