Hosting sub domain based email boxes in Exchange 2007

Hi,

I have email boxes configured on Exchange 2007 with domain mycompany.com. I want to configure sub domain based mail boxes for my subsidiaries. Ie, subsidiary1.mycompany.com, subsidiary2.mycompany.com etc.
Can I configure alias mail boxes in Exchange and it will work? Also, what changes do I need in my DNS (A record, MX record etc) to transact emails from outside.
ksquare73Asked:
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Glen KnightCommented:
What do you mean by alias mailboxes?

You can add an accepted domain of Subsidiary1.domain.com etc then create users with this email address user@subsidiary.domain.com

You would need to setup an Mx record in subsidiary1.domain.com

Then you are good to go.

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ksquare73Author Commented:
By alias mail box, I meant that adding the user to the domain in AD as xyz, his default ID becomes xyz@mycompany.com. Is it ok to create an alias mail Id as xyz@subsidiary1.mycompany.com and make that as default SMTP ID?
Glen KnightCommented:
Absolutely as long as you have added the accepted domain and MX record as per my first post.
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