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Refer<br />
<br />
<a href="http://technet.microsoft.com/en-us/library/aa996314(v=exchg.150).aspx" rel="ugc">http://technet.microsoft.com/en-us/library/aa996314(v=exchg.150).aspx</a><br />
<a href="http://forum.gotzu.com/showthread.php?tid=81" rel="ugc">http://forum.gotzu.com/showthread.php?tid=81</a>
</div>


Refer

http://technet.microsoft.com/en-us/library/aa996314(v=exchg.150).aspx [http://technet.microsoft.com/en-us/library/aa996314(v=exchg.150).aspx]
http://forum.gotzu.com/showthread.php?tid=81 [http://forum.gotzu.com/showthread.php?tid=81]

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We are in the process of purchasing a couple of smaller companies. I have been asked to host the domains for these new companies on our Exchange 2010 server. <br />
<br />
So first I need instructions on adding multiple domains to exchange 2010. <br />
<br />
Second, these companies will remain separate and on separate networks. This means the users will not be part of our domain. Is this possible? Or do I need to create a new domain in AD to go along with the new domain in Exchange?<br />
<br />
Third, how to I allow these new users to access the exchange server from outside our network using Outlook? Do I need to set up the exchange server as a POP server? If I do what are the security implications? Will it affect our current domain users and how they access their email??<br />
<br />
Thanks for any help.
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We are in the process of purchasing a couple of smaller companies. I have been asked to host the domains for these new companies on our Exchange 2010 server. 

So first I need instructions on adding multiple domains to exchange 2010. 

Second, these companies will remain separate and on separate networks. This means the users will not be part of our domain. Is this possible? Or do I need to create a new domain in AD to go along with the new domain in Exchange?

Third, how to I allow these new users to access the exchange server from outside our network using Outlook? Do I need to set up the exchange server as a POP server? If I do what are the security implications? Will it affect our current domain users and how they access their email??

Thanks for any help.

Add Domains to Exchange 2010

Windows 7 is an operating system from Microsoft. Features include multi-touch support, a redesigned Windows Shell with a new taskbar, referred to as the Superbar, a home networking system called HomeGroup, and performance improvements.

Windows 7

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.