[Today's post comes to us courtesy of Wayne McIntyre and Justin Crosby ]
There are many reasons why a company may need or want to change their domain name, there could have been a company merger/split, the current domain name is too long or not to their liking, or simply the company’s name has changed.
This post will describe the migration process from SBS 2003 to SBS 2008 when you need to change your domain name. If you do not need to change your domain name please follow the SBS 2003 to SBS 2008 Migration white paper found here http://technet.microsoft.com/en-us/library/cc546034.aspx as this is the recommended method.
This blog will demonstrate moving from Tailspintoys.local to Contoso.local.
Install SBS 2008 using the clean/new install method which will create a new domain name that you select during setup. If you want to use a TLD other than .Local you will need to create an answer file using the answer file generator to enter advanced mode setup. For more info see http://blogs.technet.com/sbs/archive/2009/01/02/introducing-the-windows-sbs-2008-answer-file.as...
You should now have 2 separate domains and servers configured on your network working autonomously. The next step is to make sure each server can perform DNS resolution of the other domain. I personally like to configure conditional forwarders for this purpose, which is described below.
You should now be able to resolve both domains from both servers.
We now need to install the Active Directory Migration Tool v3.0. The reason why we are using v3.0 and not 3.1 is because we are going to run ADMT from the 2003 server. There are a number of reasons for this, one being that ADMT v3.1 does not install on SBS 2008 without modifying a registry key first, and secondly ADMT v3.1 does not seem to accept the work around to bypass the trust requirement of ADMT. You can download ADMT 3.0 from http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=6f86937b-533a-466d-a8e8... .
Since ADMT normally requires a trust we cannot simply launch the GUI and begin our migration we need to use the below command line to launch ADMT on the SBS 2003 server and enter the password for the SBS 2008 domain names administrator account when prompted. This will allow us to bypass the trust requirement by using pass thru authentication.
Runas /NetOnly /user:2008domainname\AdministratorAccount "MMC \"%windir%\ADMT\Migrator.msc\""
We can now begin the process of migrating users, groups and computer accounts. The below steps will demonstrate the migration of user accounts.
Once we have the users on both domains, the next step will be to get the user mail over to the new server. First we will need to create a mailbox for the users in Exchange 2007.
Once the users have mailboxes, we need to run the change user role wizard from the SBS console.
Now, we have user accounts, and they have mailboxes, however these mailboxes are empty other than the welcome message and any new mail that may be coming in. We now need to migrate the users mailbox from the old SBS 2003 Exchange Server to the new SBS 2008 server with Exchange 2007.
If you need to migrate Companyweb data follow the below steps.
Steps to perform on Source (SBS 2003) server:
Steps to perform on Destination (SBS 2008) server:
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