Installing Exchange 2013 CU1 in co-existence

A simple walkthrough of the install of  Exchange 2013 CU1 in a Exchange 2010 environment. This is based on a clean server 2012 install.

Just to emphasize one thing first: CAS-arrays are out. CAS in 2013 is just a simple proxy to redirect to the correct user mailbox, so they are no longer needed.

  1. Download CU1 from http://www.microsoft.com/en-us/download/details.aspx?id=38176, and extract.
  2. Download and install the Microsoft Unified Communications Managed API 4.0, Core Runtime 64-bit from http://go.microsoft.com/fwlink/?LinkId=260990
  3. Download and install the Microsoft Office 2010 Filter Packs – Version 2.0 from http://go.microsoft.com/fwlink/?LinkID=191548
  4. Download and install the Microsoft Office 2010 Filter Packs – Version 2.0 – Service Pack 1 from http://go.microsoft.com/fwlink/?LinkId=262358
  5. Install RSAT AD DS and AD LDS Tools on the server; or run the next point on a DC. Depending on you preference and/or deployment scenario.
  6. Run  setup.exe /preparead /iacceptexchangeserverlicenseterms from an elevated command prompt. This will take a few minutes
  7. The same applies for  “setup.exe /prepareschema /iacceptexchangeserverlicenseterms” and  “setup.exe /preparedomain /iacceptexchangeserverlicenseterms” though they shouldn’t take as long.
  8. Good, now the AD bit is done, and the prereqs are there. All that remains is to actually install Exchange 2013; which will also handle server roles and features automatically.

Check for updates; always a good idea, though you probably won’t find any:




Introduction, License Agreement and Recommend Settings, nothing to worry about obviously.

You’ll notice that there are only two roles in 2013. Mailbox and CAS. Hub Transport-services are incorporated in the Mailbox-role. In my case I’ll only need the mailbox-role on this server.


Default install path. I rarely see a reason to change this.



The option to disable malware-scanning. Malware-scanning has been redesigned for 2013, while Forefront for Exchange has been taken off the market. While still early, I see no reason to disable this. Default is enabled.



Wait, what, that’s it? Yes it is. Readiness will run and prereqs will install, and you’ll be good to go.

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