Exchange 2010 to Exchange 2010

We are performing an Exchange migration from one domain Exchange server to a new Exchange in a new domain. Both servers are Exchange 2010. What is the best migration tool to simplify this move? We have limited time, and just under 100 mailboxes to move, and several public folders.
adminbcaAsked:
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vSolutionsITCommented:
Do we have both domains in same forest or different forests ?
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adminbcaAuthor Commented:
The new Exchange Server is being created in a new forest and domain but same network subnet...
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Simon Butler (Sembee)ConsultantCommented:
How much data is involved and what exactly is "limited time".
The usual method for cross forest would be to export to PST files, move them to the new server then import.

Although be aware of this issue in the new forest.
http://blogs.technet.com/sbs/archive/2009/05/21/cannot-reply-to-old-emails-or-modify-old-calendar-items-after-pst-mail-migration.aspx


Simon.
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