Active Directory Rename domain


I inherited a domain that does not have a standard FQDN

The domain is name "xyzdomain"
The NetBIOS domain name is "xyzdomain"
The DNS domain name is also "xyzdomain"

The domain does not have an extension like .local or .com

We want to change to domain so it will keep the same NetBIOS name but we will rename the FQDN to ""

I know that some application like Exchange 2007 and later does not support this operation and they are running a blend of Exchange 2003 and Exchange 2007 servers.

Since we only want to change the FQDN name and keep the same NetBIOS, What will be the impact ?

They only have 2 DC, and about 12 other servers and about 10  computer for users
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Jason CrawfordTransport NinjaCommented:
What you're referring to is a Single Label Domain.  Your best bet in this situation is to migrate to a new AD domain and Exchange server:

I've successfully completed a project just like this using ADMT and a cross-forest migration for Exchange:

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Will SzymkowskiSenior Solution ArchitectCommented:
How is this possible? When you initally setup a new Forest it fails if you do not have a proper FQDN.

What are you using as your UserPrincipalName?

You can do a domain rename however that would break Exchange so your only option would be creating a new Forest Root domain and then migrating to that one.

Jason CrawfordTransport NinjaCommented:
Exchange 2010 for sure and maybe 2013 still support Single Label Domains, but not switching from SLD to FQDN.
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Active Directory

From novice to tech pro — start learning today.