I am prepping to migrate from Windows SBS 2003 with Exchange 2003 to SBS 2008 R2 with Exchange 2007. Ideally, I would like to start from scratch with a new domain name for the 2008 install and exmerge the existing mailboxes into Exchange 2007.
I already have mailboxes that have been partially archived by ESA. Since ESA uses the GUID to track mailboxes, I'm assuming that a completely new domain setup would break the association between the archived content and the users mailbox, even though user name and email address will be the same.
Is there any way to re-associate an existing ESA mailbox store to an Exchange mailbox?
Thanks for your help.