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As discussed previously, a current list of cumulative updates and service packs for Exchange Server 2013 can be found at http://technet.microsoft.com/en-us/library
/jj907309(v=exchg.150).aspx.
When you are ready to run Setup and install an update, you can begin the installa- tion. If you are installing a new server using a current cumulative update or service pack, follow the procedure as discussed previously under “Installing Exchange Server.” Otherwise, to update an existing installation of Exchange 2013, complete the following steps:
1. Log on to the server using an administrator account. When you install the Mailbox and Client Access roles, you must use a domain account that is a member of the Enterprise Administrators group. If you’ve already prepared Active Directory, this account must also be a member of the Exchange Orga- nization Administrators group.
IMPORTANT Before beginning setup, you should ensure that the server's Win- dows PowerShell Script Execution Policy is set to unrestricted. Check the current setting by entering Get-ExecutionPolicy at a PowerShell prompt. Set the execution policy to unrestricted by entering Set-ExecutionPolicy Unrestricted. If you don't modify the execution policy, Exchange Server may not be upgraded properly. Afterward, close any open Windows PowerShell or MMC windows. Otherwise you will see a warning during the readi ness checks that you need to close these win- dows. The installation process makes updates to Windows PowerShell and MMC and requires exclusive access.
CAUTION If you are applying a cumulative update or service pack to an existing Exchange 2013 server, any customized per-server settings you made in Exchange configuration files will be overwritten. To prevent this, save your customized set- tings before you run Setup. This will help you easily reconfigure your server after the update.
2. Access the folder where you extracted the Exchange setup files, and then start Exchange 2013 Setup by double-tapping or double-clicking Setup.exe. If you’ve enabled User Access Control (UAC), you must press and hold or right-click Setup.exe and select Run As Administrator.
3. On the Check For Updates page, you can specify whether to check for updates to the setup process. If you don’t want to check for updates, select Don’t Check For Updates before you tap or click Next to continue. Setup will then copy files and initialize resources, as shown in Figure 2-9 and Figure 2-10. The server also tries to validate the state of Active Directory. If the server is unable to validate the state of Active Directory and choose a domain control- ler to work with, Setup will log errors and may also report that a domain controller could not be located. If errors are reported, do not continue with the installation. Instead, exit Setup and resolve the communication problem.
FIGURE 2-9 Exchange Server Setup copies files needed for installation to a temporary folder.
FIGURE 2-10 Exchange Server Setup prepares resources.
4. If you are installing a new server, you’ll see the Introduction page. If you are updating an existing server, you’ll see the Upgrade page, shown in Figure 2-11. Tap or click Next to continue.
FIGURE 2-11 The Upgrade page.
IMPORTANT Seeing the Upgrade page is a confirmation that Setup identified the existing Exchange 2013 installation on the server. There is a problem if you are applying an update or service pack to a server already running Exchange 2013 and don’t see the Upgrade page at this point. You may need to restart the server or resume Exchange services that have been stopped and then re-run Setup.
5. On the License Agreement page, review the software license terms. If you agree to the terms, select I Accept The Terms In The License Agreement, and then tap or click Next.
6. On the Readiness Checks page, shown in Figure 2-12, ensure the prerequisite checks completed successfully. If they haven’t, you must resolve any reported errors before you can update Exchange Server 2013. For most errors, you don’t need to exit Setup. After resolving a reported error, tap or click Retry to run the prerequisite checks again.
FIGURE 2-12 Reviewing any warnings on the Readiness Checks page.
NOTE A cumulative update or service pack may require additional Windows components. For example, Cumulative Update 1 required the Failover Cluster Command Line Interface component be installed. This is a Remote Server Ad- ministration Tool component that could be selected on the feature page of the Add Roles And Features Wizard. The component was listed under Remote Server Administration Tools, Feature Administration Tools, Failover Clustering Tools.
7. When all readiness checks have completed successfully, tap or click Install to update Exchange 2013. The installation process should take about 60 minutes.
The Setup Progress page, shown in Figure 2-13, tracks the progress of the instal- lation. The installation is performed in a series of steps, with the progress for the current step tracked with a progress bar and as a percentage of completion. The number of steps varies, depending on the tasks Setup must perform to prepare the environment, as well as the options you selected.
As part of the update, Setup removes existing Exchange files from the installation and then copies new files into the appropriate directories. Finally, you’ll see
the Setup Completed page, shown in Figure 2-14, when Setup completes the installation.
FIGURE 2-13 Tracking the progress of the installation.
FIGURE 2-14 The setup is complete.
You must restart the server to finalize the installation. After you restart the server, you can verify the update using the techniques discussed previously under “Verifying and completing the installation.” Because any customized per-server settings in Exchange configuration files are overwritten, you’ll need to restore the related files or re-create the customized settings.