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DNS/ Exchange two seperate forests

Guys,


I have two different environments/Active Directory forests which use exchange 2007/2010 and now I want to introduce them to each other without a trust. I would like to be able to send email on two different environments as if they are on the internet but using an internal network. I read where I could do this through DNS but not sure how to implement this on an internal network. My internal network have several subnets.

This is used for one forest
192.168.75.x
192.168.76.x
192.168.77.x

This is used for one forest
10.10.1.x
10.10.2.x


How do I setup DNS or what is the different options I have available for making these two enivronments talk to each other as if they are on the internet. I know I need to also build MX records. Sorry I am somewhat a newbie on this and any help would be appreciative, thanks


I have all the exchange roles and also a edge transport server installed.
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techdrive
Asked:
techdrive
1 Solution
 
AmitIT ArchitectCommented:
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techdriveAuthor Commented:
Great information and thank you but I was looking to do this with DNS. I had a specific purpose in mind for doing so, thanks.
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Simon Butler (Sembee)ConsultantCommented:
There are two ways to do this.
The preferred way is Send Connectors. That will allow you to send the email directly.

You can do it with DNS.
The easiest way is to create a zone in the local DNS server that matches the MX record, then create a host in that zone that points to the internal IP address.
For example if the MX record is mail.example.com then you create a zone for mail.example.com, and enter a host (no name) of the internal IP address.

You could go down the complete zone replacement method, although I don't tend to recommend it. That would mean creating a zone called example.com, then adding in the MX record, a host for the MX record, but also every other host that they have (www, root domain etc).

http://semb.ee/splitdns

Simon.
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