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Is GAL Sync needed for Exchange 2007 Migration?

Hi,

I am working on a Exchange 2003 migration to Exchange 2007.  Each Exchange server is in a separate forest.  Due to the number of mailboxes, migration will occur over several weeks.  Is a GAL sync needed or can I just use the MailEnableSourceAccount with the move-mailbox command when moving the mailboxes?

Correct me if I am wrong, but by using the above syntax, the user mailbox would be in domainB and if someone from domainA tries to lookup the user, the will get the info they need from the mail enabled account.
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dross333
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dross333
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1 Solution
 
SaakarCommented:
How to Move a Mailbox Across Forests
http://technet.microsoft.com/en-us/library/aa997145(EXCHG.80).aspx
GalSync will not be used in Exchange 2007 scenario, it will be ILM
Check the below link for more info.
http://technet.microsoft.com/en-us/library/aa998597(EXCHG.80).aspx 
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dhruvarajpCommented:
please go through
http://msexchangeteam.com/archive/2007/07/16/446321.aspx 

Galsync should work for the innitial synch.. and as you need not synch back from 2007 to 2003 ILM not needed
however better to go with ILM to be on safer side
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dross333Author Commented:
Thanks for the responses. But I guess I'm still confused.  If using the MailEnableSourceAccount or CreateSourceContact  command while moving the mailboxes creates the contact, then why will I need to use ILM for GAL Sync?

Thanks
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dhruvarajpCommented:
how would the migrated users be able to find the non migrated ?
if there is no Gal Synch

.. mailenablesource... .. will let the non migrated users email the migrated as they now exist as contacts in the same domain


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dross333Author Commented:
Thank You
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