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2003 exchange migratie to exchange 2010 with multi email address

Dear all Experts,

We need to migrate our exchange 2003 to a new server with exchange 2010 and windows server 2008 R2  but we are different story than others.

We are using windows 2003 server std sp2 with exchange 2003 std.
We have 3 different company but only one exchange server, we have a default domain (@abc.com) and set other two domain in exchange email-address(policy) say @xyz.com, @123.com  all DNS point to the same server by ISP. All colleague have different username to access that 3 different email address.

What we need is a big change.

1) we want to use @123.com to be the default domain instead of @abc.com

2) we want the colleague only have one username which can access all email (alias)

3) we want the colleague can choose which email address to be sender in outlook 2010

 4) how can we first setup the @123.com in new server which won't effect others.
 

I am really newer, can anyone guild me step by step which I really have no idea what to do

cheers
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tonycwl
Asked:
tonycwl
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1 Solution
 
James HodgeManaging DirectorCommented:
Hello,

The requirement to 'send from' the @abc.com and the @xyz.com email addresses is what makes this a little more complicated. Getting email to them is easy, like you said, accepted domains and editing the default email address policy.

You can 'send from' one of your email aliases, so, to achieve what you want, you are going to need to create a seperate mailbox for each account e.g. tony@123.com is the mailbox associated with your user account. However, you will need to create a second mailbox for tony@abc.com and another mailbox for tony@xyz.com

To tidy this up a bit, you can forward incoming mails for the 2nd and 3rd mailboxes to the primary mailbox so all incoming email presents in one mailbox.

James
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tonycwlAuthor Commented:
Dear James,

thanks for your quick reply, as what you said, we still need to create different user account in AD for each colleague? We hope can minimize the cals we need to purchase.

also how can we setup the new exchange server, we setup using @123.com as fully-qualified domain name instead of @abc?
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James HodgeManaging DirectorCommented:
Yes this will create an associated AD user account for the mailbox. You wont need to use a CAL if you configure as device CAL's.

The subject of disjointed DNS is a huge topic and thats what you are brushing on here.

Are you referring to internal DNS FQDN? You can use a 'split-brian' dns setup where your internal domain is for example 123.local and your external DNS records are mail.123.com and mail.abc.com

Or you can use *.123.com as your internal DNS (for FQDN's).

The only difference in regards to Exchange is that this will setup your accepted domain and email address policy for this domain name during setup; whereas in 'split-brian' you need to set this up manually. (you are going to need to setup your 2nd and 3rd domain names anyway).

James
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tonycwlAuthor Commented:
how can we setup associated AD user account for mailbox?

sorry, I make a mistake not @123.com is just *.123.com for fully-qualified domain, by the way I think the good things is our MX is hold by one of the ISP, which mean they do the routing for all three email address from us and will forward to our server,

What mean  split-brain? I prefer to use easy way as email address policy, can I ?
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James HodgeManaging DirectorCommented:
You can use the New Mailbox Wizard in the Exchange Management Console to create a mailbox and associated AD user.

Yep, Email Address Policy is fine.
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tonycwlAuthor Commented:
James,

Do you have any guild to setup exchsnge step by step , coz I am really newer and worry did something wrong
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James HodgeManaging DirectorCommented:
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