troubleshooting Question

Exchange 2007 / multiple email domains

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milehijones asked on
ExchangeEmail Servers
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Folks - I am hoping someone can tell me if this is possible or not.  

Setup:  Windows Server 2008 R2 / Exchange Server 2007 / Active Directory:

I want to be able to host email accounts for a email domain called and create users that can authenticate with as their username.  

But currently I am only able to authenticate users as  How can I get this server to authenticate users using their as the username?  

Basically I envision it working where the main domain is really just there behind the scenes. I would like to have users authenticating through whatever email domain ( format) they happen to be apart of.

I hope that make sense - let me know if you have questions about the way I described this.

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