Second exchange 2003 server in new domain

I currently have 2 domains in 1 forest.  We currently run the exchange server on domainA and it serves both domainA and B.  We are looking at putting a second exchange server in a remote office on domainB.  Would there be any benifit to installing this as a second exchange server? can i even do that seeing as its in another domain?

Or should i just install a new exchange server and configure accordingly?

Just not sure of the benifits if there are any?

also, would there be a better way to increase performance in the remote office without adding a exchange server?  users find it slow to open attachments.  bonded t1 in the main office and t1 in the remote.

thanks,

Chad
lgropperAsked:
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SembeeConnect With a Mentor Commented:
For the antivirus question, that depends on the licensing.
If you are licensed per mailbox, then you may be allowed to install the application on as many servers as you like.

Simon.
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SembeeCommented:
Are the remote users in cached mode? If not, then that would help.

If you put an Exchange server in the remote office then it needs a domain controller. It also needs backup, antivirus etc.

Whether you should or not is really down to the business. You haven't said how many users are in this remote office, the message flow or the type of messages that they are sending.

The recommendation I would make for an office of 10 designers sending large messages to each other is different to an office of 50 telesales people.

You can install Exchange in to the second domain, if both domains are in the same forest. You will need to domain prep the second domain and allow for replication time before continuing.

Simon.
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lgropperAuthor Commented:
It's a smaller office about 15 users... some are designers and some are just regular users.   The costs of setting up a exchange server with a dc are quite large.  But they complain about the attachments... at least the users who get large attachment.

Thanks for the input Simon!  

Cached mode is a great idea, i'm going to play with that... see if it works any better.  Maybe see if we can up the pipe in the remote office a bit before going to a whole setup.

What would be the impact if we used our mail relay server to scan for viruses then sending it to the remote office? it would save on anti virus costs.

thanks,
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