Mailbox move migration from exchange 2007 to Exchange 2010 in different forest

Hi We are planning to move mailboxes from exchange 2007 to another Exchange server 2010 located in different forest and domains. The email address domain is the same.
Do you know about any good tool for this task?

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ssmith81Connect With a Mentor Commented:
There are lot of guides available online and by following them, you can prepare and proceed cross forest migration from exchange 2007 to 2010. Some of them I have mentioned below :
Exchange-2010-cross-forest-migration step by step guide
Adam BrownConnect With a Mentor Sr Solutions ArchitectCommented:
You can do this without tools if you have a trust between the forests set up. has a lot of info on how it works. If you don't want to do that, Migration Wiz is a good solution.
R--RConnect With a Mentor Commented:
You have to implement cross forest migration in this case.

Please follow the link as below from
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