Server 2012 R2 change Domain name?

A client is changing their company name and wants the logon domain name altered to match. Is there a less painful way to do this than rebuild the machine. Their e-mail is dealt with in the Cloud so it's really a question of the Logons.

I suspect a simple question is actually far from simplistic.
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edhastedAsked:
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Scott CSenior Systems EnginerCommented:
Here is a Microsoft TechNet article on renaming domains.

https://technet.microsoft.com/en-us/library/cc738208(v=ws.10).aspx

Yes, it is less painful than rebuilding the machine.

Just make sure you have a full backup before you start.

Here is another article with step-by-step instructions.

https://mizitechinfo.wordpress.com/2013/06/10/simple-guide-how-to-rename-domain-name-in-windows-server-2012/

It's good that your email is in the cloud as a domain name change in an Exchange environment isn't supported.
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BembiCEOCommented:
The fast answer is: yes, possibly....
The true answer is: it is not painless...

The point is that you have not only your active directory domain but a lot of services, which rely on this domain. If you change the domain name and get not rid of all relations you currently have, you will experience a big mess and manual work until all items are fixed....

For introduction you may read this blog....
http://www.rebeladmin.com/2015/05/step-by-step-guide-to-rename-active-directory-domain-name/

It sounds possible in a test environment, but for living companies with a longer history, there maybe much more items to put into scope than just the one in the article.

But possibly a better concept is  - if this is really needed - to follow a procedure of a cross forest migration, what is the usual procedure for merging companies or due to other misconceptual reasons from the past.
There ar also tools outside for cross domain migrations. Means you build up a new domain and new infrastructure and move the users and data over into the new environment.

The other question is, if this is just a cosmetical request, as the AD is usually not visible to the outside world and if a old name doesn't produce too much headache, maybe better to leave it.
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edhastedAuthor Commented:
Very many thanks - will work my way through these overnight and report back.
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Cliff GaliherCommented:
If hey only want to change logins, change the UPN for the account. You can do this without changing the AD name or complex migrations. The only people who see the domain is sysasmins. Changing UPNs is quite simple.
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Rich BullockIT Systems EngineerCommented:
I agree with cliff - add a new domain suffix from active directory domains and trusts.
You will then need to do a dsget | dsMod script to change the suffix for all your users in one go.
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edhastedAuthor Commented:
Thanks will work our way through this tomorrow.
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