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Can an oganisation using multiple domains use Exchange Server 2003 Standard


A client wants to use a remote Exchange 2003 Standard Server using RDP over HTTPs. The company has three satellite offices operating three exchange servers. They want to keep the three domain names and have colloboration, calendars etc, for each office kept disctinct.

Therefore, will they need a storage group for each site? Can the Standard version of Exchange handle this or will they need to upgrade to Enterprise to run all three domains and / or databses within one remote box?

Thanks for any input.


1 Solution
Chris DentPowerShell DeveloperCommented:

Hi Derek,

Exchange (2003 and 2007) can handle as many inbound mail domains as you wish (as long as it can cope with the amount of messages). Exchange (both versions) can not be a member of more than one Active Directory Domain though.

Exchange 2003 Standard also cannot have more than one Mailbox Store and one Public Folder Store. To run more than one mailbox database on a single it would need an upgrade to Enterprise there.

If you were to upgrade that it would probably be sensible to take a look at Exchange 2007 Standard which lets you have up to 5 Stores (a mixture of Private and Public if I remember correctly) rather than going to the expense of Exchange 2003 Enterprise.

Exchange 2007 will also give you a lot more options for resilience and management.

If you're sticking with 2003, I guess you're pretty much looking at a hosted exchange type configuration (you're doing the hosting)?

msexchange.org have a couple of good articles on setting it up here:


And for Exchange 2007 it's here:



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