exchange 2010, exchange 2013

We are doing an interorg migration


What do we need to do to establish connectivity between one domain and other domain •      
How do we set up GAL synchronization between the orgs? How do we monitor it to make sure it’s working?
•How does free/busy federation work, and how do we know if it’s not working?
•How do we manage mailboxes when we move them to •      How do we manage the forwarding from ?
pramod1Asked:
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Leon FesterSenior Solutions ArchitectCommented:
I'd suggest changing the wording in your initial statement:
"We are PLANNING an interorg migration"

There is not enough details about your environment to make decent recommendations that you would be able to derive yourself after going through the exchange/domain migration guides on the Microsoft website.

There is a little confusion in what you want to do:
you say you want to do interorg migration but you also ask about keep GAL's sync'ed and federation.

Interorg migration implies you're merging domains so that your two organizations end up using shared services and a single exchange environment.

GAL sync and Federation would refer to two different domains having integration points between to different domains and two exchange environments.

Have a read through the following link to get you started on your migration planning:
http://blogs.technet.com/b/exchange/archive/2010/08/10/3410619.aspx
http://technet.microsoft.com/en-us/library/aa998597(v=exchg.150).aspx

Also have a look at Microsoft Identity Lifecycle Manager (ILM) and Microsoft Forefront Identity Manager (FIM) which offer your GAL Sync and Federation services.

Also have a look at Active Directory Migration Tool (ADMT) for addition knowledge and tools on the Active Directory migration requirements.
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