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I'm preparing to install Exchange 2007 onto Windows 2008 R2 in a domain with 2 @ Windows 2003 R2 DC's. 
 
They have never had an exchange server before and their domain on the controllers is 
 
abc.local 
 
Now we are a multiple domain company. 
 
1. acd.com 
2. def.com 
3. ghi.com 
4. jkl.com 
5. mno.com 
 
all of the users are in the abc.local domain and in AD they each have a different folder. 
 
AD folders 
acd 
def 
ghi 
jkl 
mno 
 
The users are listed under there per company name. 
 
the acb.local is not routable and do not have any DNS registered for it. 
 
do i need to be concerned about the abc.local domain configuration setting up exchange 2007 to handle the 5 routable DNS registered domains? 

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I'm preparing to install Exchange 2007 onto Windows 2008 R2 in a domain with 2 @ Windows 2003 R2 DC's. 

They have never had an exchange server before and their domain on the controllers is

abc.local

Now we are a multiple domain company. 

1. acd.com
2. def.com
3. ghi.com
4. jkl.com
5. mno.com

all of the users are in the abc.local domain and in AD they each have a different folder.

AD folders
acd
def
ghi
jkl
mno

The users are listed under there per company name.

the acb.local is not routable and do not have any DNS registered for it.

do i need to be concerned about the abc.local domain configuration setting up exchange 2007 to handle the 5 routable DNS registered domains?


Exchange 2007 and multiple domains

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.