Exchange 2003 to Exchange 2010 Migration
Posted on 2014-03-11
I am in the process of beginning an Exchange 2003 to Exchange 2010 migration. I have a Dell PE R720 with Windows Server 2012 OEM. I believe this OS comes with two free VMs, and have several questions about installing the preferred OS for the VMs and AD servers, etc.
I am planning a two step migration (Exch2003 to Exch2010, and then in the future Exch2010 to Exch2013). We have (18) Exchange mailboxes.
Our Current AD environment contains two DCs (primary with all roles is a Windows 2003 R2 server). I have an alternate Windows Server 2012 DC on the network as well. The Domain Functional Level and Forest Functional Levels are at Windows Server 2003.
I really need to get rid of the primary Windows 2003 DC altogether. I understand I need to move all the FSMO roles to the other DC before running DCPromo to demote and remove it from the domain.
In this scenario I have several questions:
1. I only have a Windows Server 2012 DC once the existing Windows 2003 DC is demoted and removed from the Domain. Is this advisable before migrating Exchange 2003? I do not think Exchange Server 2003 will work with such an advanced DC design.
2. Should I simply leave the DC as is, and conduct the Exchange migration, and then once the migration is completed to Exchange 2010 then move the FSMO roles and demote the Windows 2003 Server?
3. The exchange 2010 server will be a VM. I am not sure if Windows Server 2012 Standard OEM allows downgrading the VMs to Windows Serve 2008 R2. I am thinking Exchange 2010 ought to work fine on a Windows Server 2012 OS. Then again, I believe it was designed on the Windows Server 2008 platform.
I simply want to minimize as much disruption in the AD domain, and then also mail flow. The migration path seems to provide minimal disruption over a specified period of time compared to creating a new Windows Server 2012 AD with a clean Exchange 2013 rollout. Please let me know if a 2003 AD will be fine for the exchange migration, etc. Then also whether Exchange 2010 can be installed on Windows Server 2012 or if its better on a Windows Server 2008 R2. Thanks.