Upgrading/Deploying Exchange 2013 Cumulative Update 2

Important: To prevent issues during the installation or upgrade of Exchange 2013 RTM CU2, you should ensure that the Windows PowerShell Script Execution Policy is set to “Unrestricted”. Failure to do so could cause the Exchange 2013 server to be in an unusable state and some downtime could occur. To verify the policy settings, run the Get-ExecutionPolicy cmdlet from PowerShell on the Exchange 2013 Server(s). To change the Policy run:  set-executionpolicy -executionpolicy unrestricted

Active Directory Preparation

Prior to upgrading or deploying the new build onto a server, you will need to update Active Directory. For those of you with a diverse Active Directory permissions model you will want to perform the following steps:

  1. Exchange 2013 RTM CU2 includes schema changes. Therefore, you will need to execute .\setup /PrepareSchema /IAcceptExchangeServerLicenseTerms
  2. Exchange 2013 RTM CU2 includes enterprise Active Directory changes (e.g., RBAC roles have been updated to support new cmdlets and/or properties). Therefore, you will need to execute .\setup /PrepareAD /IAcceptExchangeServerLicenseTerms

Server Deployment

  • Once the preparatory steps are completed, you can then deploy CU2 and start your coexistence journey. If this is your first Exchange 2013 server deployment, you will need to deploy both an Exchange 2013 Client Access Server and an Exchange 2013 Mailbox Server into the organization. As explained in Exchange 2013 Client Access Server Role, CAS 2013 is simply an authentication and proxy/redirection server; all data processing (including the execution of remote PowerShell cmdlets) occurs on the Mailbox server. You can either deploy a multi-role server or each role separately (just remember if you deploy them separately, you cannot manage the Exchange 2013 environment until you install both roles).
  • If you already deployed Exchange 2013 RTM code and want to upgrade to CU2, you will run .\setup /m:upgrade /IAcceptExchangeServerLicenseTerms from a command line after completing the Active Directory preparatory steps or run through the GUI installer. Deploying future cumulative updates will operate in the same manner.
Note: Unlike previous versions, in Exchange 2013, you cannot uninstall a single role from a multi-role server. For example, if you deploy the CAS and MBX roles on a single machine, you cannot later execute setup to remove the CAS role; you can only uninstall all server roles.

If you want to see which version your server is running, simply run

get-exchangeserver |ft name,admindisplay*

in the Exchange PowerShell console.

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