We are in the process of setting up Exchange 2013, and I'm unsure of how our DNS is needing to be setup. Mainly whether we have a disjoint name space or not and what settings we need. I don't think ours is disjoint, but any info would be appreciated. Also as far as split DNS goes any info is helpful as well. We are running windows 2008 servers R2 with the forest and AD at that level as well. Below is example info that mirrors our current setup. We only have windows 7 and above PC's our Internet domain name is: corp.com our AD domail name is: internal.corp.com Netbios name is:internal DNS is hosted internally(AD) and looks to opendns for external addresses. Our Exchange server is named: mail.internal.corp.com Thanks in advance for any help.

Hi, What's intermet domain ? Do you mean the domain name you access mailbox from internet ?Wendy Liu TechNet Community Support

Hi, What's intermet domain ? Do you mean the domain name you access mailbox from internet ? Wendy Liu TechNet Community Support Sorry, yes correct, our email domain name is corp.com. The internal Domain is internal.corp.com. obviously these are examples only.

Here is a quote from a TechNet article: "A disjoint namespace occurs when one or more domain member computers have a primary Domain Name Service (DNS) suffix that does not match the DNS name of the Active Directory domain of which the computers are members. For example, a member computer that uses a primary DNS suffix of corp.fabrikam.com in an Active Directory domain named na.corp.fabrikam.com is using a disjoint namespace." So, if you AD domain is internal.corp.com and all of your computers use internal.corp.com as their primary DNS suffix then you do not have a disjoint namespace. It is rare to have a disjoint namespace. Link to the article: http://technet.microsoft.com/en-us/library/cc731125(v=ws.10).aspx Byron Wright (http://byronwright.blogspot.com)

Here is a quote from a TechNet article: "A disjoint namespace occurs when one or more domain member computers have a primary Domain Name Service (DNS) suffix that does not match the DNS name of the Active Directory domain of which the computers are members. For example, a member computer that uses a primary DNS suffix of corp.fabrikam.com in an Active Directory domain named na.corp.fabrikam.com is using a disjoint namespace." So, if you AD domain is internal.corp.com and all of your computers use internal.corp.com as their primary DNS suffix then you do not have a disjoint namespace. It is rare to have a disjoint namespace. Link to the article: http://technet.microsoft.com/en-us/library/cc731125(v=ws.10).aspx Byron Wright (http://byronwright.blogspot.com)