Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

(capt) Windows 2003 Server AD upgrade to Windows 2012

Posted on 2015-02-24
5
Medium Priority
?
159 Views
Last Modified: 2015-03-03
Hi

We have an old AD environment consisting of various servers for multiple purposes:
2x Domaincontroller (AD01 and AD02)
2x FileServer
1 MS VPN Server (VP01)
1 Mailserver running Lotus Notes

I would like to minimise the amount of servers, and have already consolidated the Fileservers. Now that the 2003 Server is EOL I want to upgrade the Domaincontrollers and decommission the VPN server.

The VPN server VP01 acts as a gateway for the Users and provides the logging of Routing & Remote Access functionality. The certificates for the VPN clients are handled by the Backup DC (AD02)

And now for the very broad and general Q.....How do I upgrade the two DCs to Windows 12R2 and configure VPN? Will my other 2003 servers that I am not upgrading talk to the new servers no problem?

I appreciate that this is a very non detailed question, but as I don't even know where to start, I thought this could be an iterative process...

Thanks
capt.
0
Comment
Question by:captain
5 Comments
 
LVL 10

Assisted Solution

by:Muhammad Mulla
Muhammad Mulla earned 400 total points
ID: 40628126
A good place to start is making an audit of all the applications in your environment and checking that they will be compatible. Update any apps that might need an update.

This series of blog posts is quite good: http://blogs.technet.com/b/askpfeplat/archive/2013/06/03/upgrade-active-directory-to-windows-server-2012-phase-1-assessment.aspx
0
 
LVL 53

Accepted Solution

by:
Will Szymkowski earned 800 total points
ID: 40628151
How do I upgrade the two DCs to Windows 12R2 and configure VPN? Will my other 2003 servers that I am not upgrading talk to the new servers no problem?
You will not be able to do an in-place upgrade for your domain controllers. You will have to spin up new 2012 servers, and promote them as Domain Controllers in your environment.

From there 2003 and 2012 DC's will talk to each other (replicate etc) you will then need to transfer the FSMO roles to one of the 2012 servers. The next step would be configure your PDC on the 2012 server as the authoritative time source, and point your DHCP clients to the new 2012 DC's for DNS.

From there you would then ensure replication is working properly, then demote the 2003 domain controllers.

Commands to verify replicaiton
repadmin /replsum
repadmin /showrepl
repadmin /birdgeheads
dcdiag /v

Setup Authoritative Time Server for PDC
http://support.microsoft.com/kb/816042

Time Server Hierarchy explained.
http://blogs.technet.com/b/nepapfe/archive/2013/03/01/it-s-simple-time-configuration-in-active-directory.aspx

Will.
0
 
LVL 35

Assisted Solution

by:it_saige
it_saige earned 800 total points
ID: 40628235
In addition to the comments by Will, you also want to ensure that your Domain and Forest Functional levels are set to Windows Server 2003.

Understanding Active Directory Domain Services (AD DS) Functional Levels

You also may have to modify the component services on the 2003 DC that you are performing the ADPREP on.

http:/Q_28584877.html#a40514872

Finally, Kerberos authentication can fail intermittently (Microsoft has a hotfix for this issue) -

http://blogs.technet.com/b/askds/archive/2014/07/23/it-turns-out-that-weird-things-can-happen-when-you-mix-windows-server-2003-and-windows-server-2012-r2-domain-controllers.aspx

-saige-
0
 
LVL 31

Author Comment

by:captain
ID: 40628249
Thanks so far, very useful.
0
 
LVL 31

Author Closing Comment

by:captain
ID: 40641790
Thanks. This has been postponed for a couple of months.

Very helpful suggestions
0

Featured Post

Problems using Powershell and Active Directory?

Managing Active Directory does not always have to be complicated.  If you are spending more time trying instead of doing, then it's time to look at something else. For nearly 20 years, AD admins around the world have used one tool for day-to-day AD management: Hyena. Discover why

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

The following article is comprised of the pearls we have garnered deploying virtualization solutions since Virtual Server 2005 and subsequent 2008 RTM+ Hyper-V in standalone and clustered environments.
Background Information Recently I have fixed file server permission issues for one of my client. The client has 1800 users and one Windows Server 2008 R2 domain joined file server with 12 TB of data, 250+ shared folders and the folder structure i…
In this Micro Tutorial viewers will learn how to restore single file or folder from Bare Metal backup image of their system. Tutorial shows how to restore files and folders from system backup. Often it is not needed to restore entire system when onl…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…

876 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question