Dear all,

We currently are running Windows Server 2003 DC's in a 2003 domain/forest functional level.

Also are running Exchange 2003 Enterprise SP2 and Exchange Sever 2010 + SP3 (DAG) in coexistance

We are planning on adding 2012 ADC to the domain and Promote windows 2012 ADC to DC and commission Windows 2003 DC.

by doing my environment picture will be ;

Domain Controller = windows 2012 Std

Exchange Server 2003 and Exchange Server 2010.

and in a month or so will be moving all Exchange Server 2003 users to Exchange Server 2010 this is the plan.

So, can any one help me with Standard practice for this.

Hi Atula,

• Here's a step-by-step guide to adding a 2012 R2 DC to a Level 2003 Domain.
• Here's a guide to demote a 2003 DC. (Remember to ensure global catalog existence and FSMO roles are on new DC before doing this!)
• Here's an external guide for the entire process.

Cheers,
Fred

Before you upgrade your domain you will need to move all of your users to Exchange 2010 and decommission your 2003 installation.

Also make sure your 2010 environment is at least at SP3 RU5.

https://technet.microsoft.com/library/ff728623(v=exchg.150).aspx  

Hi,

Exchange 2003 does not support Windows Server 2012 Domain Controllers. Before you introduce Windows Server 2012 DC, you will need to move all of your users to Exchange 2010 and decommission your Exchange 2003 Server.

Here is a related article for your reference.

http://blogs.technet.com/b/rmilne/archive/2013/09/17/exchange-support-for-windows-server-2012-r2.aspx

Best regards,

If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com

Hi,

Is there any update on this issue?

Best regards,

If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com

Not touched yet, will update the progress here