Exchange cross Forest Migration 2003 to 2007

Tags:
Microsoft Exchange 2003
Microsoft Exchange 2007
Microsoft Exchange migration
Migration
I am in the position of having to acheive an Exchange migration from 2003 current to 2007 also crossing from domain abc.com to abc.def.com for all applications / users. We also use a mail archiving product (Symantec Enteprise Vault).

I am looking for a recommended approach to the Echange part. I belive the use of a resource Forest for exchange will allow me the easiest route allowing more time for the application side to be planned and exceuted.

Due to a large number of users and mail / archive data this migration will take an extended period of time and the need to maintain calendaring across migrated / unmigrated users is paramount to my business.

Thanks in advanced to anyone who is in a position to enlighten me



Software/Hardware used:
,Exchange 2003 2007

Answer Wiki

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Hi, we used IIFP tool for GAL and Exchsync for Calendar and Public Folder replication between the two Forests in the interim while we migrated a/cs and mailbox. Both are free MS tools. It takes a little time to set it up but once it is set up it works very well. Please set it up in a test env first to get the feel of it. Here are the links for step by step IIFP set up and IIFP automation. Hope it helps.

IIFP Setup:

http://exchangeserverinfo.com/2008/06/22/configuring-schedule-free-busy-information-between-the-forests–exchange-2007–2003.aspx

IIFP automation.

http://msmvps.com/blogs/clustering/archive/2004/10/06/15141.aspx

Best,
– Subin

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