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Hide child domain GAL from exchange users in parent domain

I was wondering if someone would be able to tell me how to hide the child domain GAL from exchange users in the parent domain. For example, parent domain is called domain1.local and child domain is called child.domain1.local. Now, if the child domain exchange users use a @domain1.local suffix is it possible to hide the GAL from the parent domain? if not is it possible to change the suffix to @child.domain1.local? so the email address would be test@child.domain1.local.

any advice or ideas on how to do this would be very welcome.

Marius Gunnerud

ASKER

Does anyone know if it is possible to do this?

Amit

Exchange version? 2003 / 2007 /2010 which one you are using

Amit

Add a new Recipient policy for child domain and move it above default policy

Marius Gunnerud

ASKER

Exchange 2010. Sorry forgot to mention that

Amit

Adding new email address policy for child domain, could be the solution, but i don't think you can hide.
http://technet.microsoft.com/en-us/library/bb125137.aspx

Check this also
http://www.messagingtalk.org/how-to-create-multiple-address-lists-using-exchange-2010

Marius Gunnerud

ASKER

Would you know if it is possible that once the new child domain address list is created, will users in the parent domain see this new child domain list? is there a way to hide this list, or create a policy to deny users in the parent domain acces to view this list?

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Amit

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Marius Gunnerud

ASKER

hmmm, I know this is off topic for this question, but would you by chance know of a link so I can read more on creating a different forest for a child domain?

Problem is that the child domain needs to us CA from the parent domain and needs to access several databases.