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No version of Exchange is (yet) certified for Windows 2012 R2.<br />
Uninstall and reinstall on 2012.<br />
<br />
<i><u>Exchange Support For Windows Server 2012 R2</u></i><br />
<br />
<a href="http://blogs.technet.com/b/rmilne/archive/2013/09/17/exchange-support-for-windows-server-2012-r2.aspx" rel="ugc">http://blogs.technet.com/b/rmilne/archive/2013/09/17/exchange-support-for-windows-server-2012-r2.aspx</a><br />
<br />
<i><u>Exchange Not Yet Supported on Windows Server 2012 R2</u></i><br />
<a href="http://redmondmag.com/articles/2013/09/23/exchange-not-supported-server-2012.aspx" rel="ugc">http://redmondmag.com/articles/2013/09/23/exchange-not-supported-server-2012.aspx</a>
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No version of Exchange is (yet) certified for Windows 2012 R2.
Uninstall and reinstall on 2012.

Exchange Support For Windows Server 2012 R2

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

Exchange Not Yet Supported on Windows Server 2012 R2
http://redmondmag.com/articles/2013/09/23/exchange-not-supported-server-2012.aspx [http://redmondmag.com/articles/2013/09/23/exchange-not-supported-server-2012.aspx]

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So I thought I did everthing right, but I guess I should of checked Exchange Blog. I installed Exchange 2013 on a Server 2012r2 box . Last night I found out about the issues with powershell 3 vs 4 on 2012r2. So I completly installed and update to CU2v2 minus mailbox moves and SSL. My question is I want to use the same VM and naming. <br />
1. What issues will I have if I blow out this VM and reinstall on this server.<br />
2. Do I need to do anything with AD prior.<br />
3. Do I need to uninstall Exchange or can I just rebuild over the old VM config.<br />
4. This is currently in coexsistance w 2007 no mailboxes where moved. <br />
<br />
I am just going to install server 2012 and then re-install exchange 2013<br />
<br />
Thanks in advance.
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</div>


So I thought I did everthing right, but I guess I should of checked Exchange Blog. I installed Exchange 2013 on a Server 2012r2 box . Last night I found out about the issues with powershell 3 vs 4 on 2012r2. So I completly installed and update to CU2v2 minus mailbox moves and SSL. My question is I want to use the same VM and naming. 
1. What issues will I have if I blow out this VM and reinstall on this server.
2. Do I need to do anything with AD prior.
3. Do I need to uninstall Exchange or can I just rebuild over the old VM config.
4. This is currently in coexsistance w 2007 no mailboxes where moved. 

I am just going to install server 2012 and then re-install exchange 2013

Thanks in advance.

Exchange 2013 and Server 2012r2

Microsoft server applications are those applications developed specifically, but not necessarily exclusively, on the Windows Server platform. In addition to well-known products like SQL Server, Exchange, Internet Information Services (IIS), Microsoft Dynamics, Forefront, Lync and Sharepoint, they include applications like Skype, BizTalk, Hyper-V, Groove and Commerce Server. Server applications are managed with the Microsoft System Center.

Microsoft Server Apps

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Windows Server 2012 is the server version of Windows 8 and the successor to Windows Server 2008 R2. Windows Server 2012 is the first version of Windows Server to have no support for Itanium-based computers since Windows NT 4.0. Windows Server 2012, now in its second release (Windows Server 2012 Release 2) includes Foundation, Essentials, Standard and Datacenter, and does not support IA-32 or IA-64 processors.