Can Exchange 2010 handle multiple companies and domains?

Hi Experts

Can Exchange Server 2010 handle multiple domains and companies.

Please note this is not a case of the same user having several domains, as in: is the same person as
In the above example and for what I want "fred" would be two different people.

If it's possible, can someone point me to information please?
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AkhaterSolutions ArchitectCommented:
yes totally possible

all you need to do is set and as accepted domains (EMC -> organization config -> hub transport) then create an email address policy for each of the specified domains

Alan HardistyCo-OwnerCommented:
Yes, you can handle multiple domains / companies in Exchange 2010, just like any version of Exchange.

My own 2010 test server gas about 30 domains on it and it works very well.

If you want to segregate the address lists, so that one company cannot see the other, please let me know.
Alan HardistyCo-OwnerCommented:
Here is the article I used to segregate address lists, which is for Exchange 2007 but works happily for Exchange 2010:

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AkhaterSolutions ArchitectCommented:
RogerIvyAuthor Commented:
Thanks for the answers so far alanhardisty and Akhater.

I have a few questions:
1. Does each username need to be unique, using my example of "fred" if I am combining two Exchange sets that both had "fred" (different people)? If possible I don't want to force one of them to send emails out to all contacts to change his address to something like "fred.smith"
2. Will OWA require two public IPs to facilitate https?
AkhaterSolutions ArchitectCommented:
1. Do not mistake username and email addresses, yes username should be unique as fred and fred1 for instance however there is no restriction at all if their email addresses are and

2. No need to have 2 ip address they can happily share the same OWA.

If you want each domain to reach OWA using its own url i.e. and you can just have one certificate with multiple SAN
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