{"id":95622,"date":"2022-03-11T07:15:15","date_gmt":"2022-03-11T07:15:15","guid":{"rendered":"https:\/\/www.stellarinfo.com\/blog\/?p=95622"},"modified":"2022-03-25T10:17:20","modified_gmt":"2022-03-25T10:17:20","slug":"install-cumulative-update-cu23-exchange-server-2013","status":"publish","type":"post","link":"https:\/\/www.stellarinfo.com\/blog\/install-cumulative-update-cu23-exchange-server-2013\/","title":{"rendered":"How to Install CU23 for Exchange Server 2013?"},"content":{"rendered":"<?xml encoding=\"utf-8\" ?><?xml encoding=\"utf-8\" ?><p>Microsoft Exchange Servers to the latest Cumulative Updates is highly critical. It helps keep your on-premises Exchange Servers ready for the next emergency security updates released by Microsoft to patch vulnerabilities. &nbsp;&nbsp;<\/p><p>If your server is not running a supported Cumulative Update, it is ineligible for the security updates and remains vulnerable to malicious attacks. With increasing attacks on on-premises Exchange Servers, it&rsquo;s now more important than ever to keep your servers updated to the latest Cumulative and Security updates.&nbsp;<\/p><p>Microsoft released the Cumulative Update 23 (CU23) for Exchange Server 2013 on May 3, 2021. The latest Cumulative Update 23 contains all security updates released before May 2021 and is eligible to receive newer security updates and patches. &nbsp;<\/p><p>Thus, if your organization is running an older Exchange Server 2013 CU, it is highly recommended to update to CU23 to continue receiving the latest hotfixes and stay protected against malicious attacks.<\/p><p>In this post, you will learn the step-by-step process to upgrade Exchange Server 2013 to Cumulative Update 23 and install the latest Security Updates.<\/p><h2 class=\"wp-block-heading\" id=\"steps-to-install-exchange-server-2013-cu23\">Steps to Install Exchange Server 2013 CU23<\/h2><p>Follow these steps to install CU23 for Exchange Server 2013.<\/p><p><strong><em>Caution: <\/em><\/strong><em>Backup Exchange customizations, such as IIS settings,<\/em> <em>custom registry entries, and Outlook on the web (OWA) customizations (if any) as installing CU may overwrite or remove them.<\/em><\/p><h3 class=\"wp-block-heading\">Step 1: Download the Exchange Server 2013 CU23 Build<\/h3><p>Download the <a href=\"https:\/\/www.microsoft.com\/en-us\/download\/details.aspx?id=58392\">Exchange Server 2013 CU23 update<\/a> released on May 3, 2021. You can also visit the <a href=\"https:\/\/docs.microsoft.com\/en-us\/exchange\/new-features\/build-numbers-and-release-dates?view=exchserver-2019\">Exchange Server build number and release dates<\/a> page to download the latest CU and install it.<\/p><figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"657\" height=\"379\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/03\/download-cumulative-update-23-for-exchnage-2013.png\" alt=\"download cumulative update 23 for exchnage 2013\" class=\"wp-image-95626 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/03\/download-cumulative-update-23-for-exchnage-2013.png 657w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/03\/download-cumulative-update-23-for-exchnage-2013-300x173.png 300w\" sizes=\"auto, (max-width: 657px) 100vw, 657px\" \/><\/figure><p>Make sure to choose your language before downloading the CU.<\/p><h3 class=\"wp-block-heading\">Step 2: Update Active Directory and Schema<\/h3><p>Use <strong>\/PrepareAD<\/strong> to update and prepare the Active Directory forest on your Exchange Server 2013 for CU23. It is also recommended that you extend schema by using the <strong>\/PrepareSchema<\/strong> if the system is a member of the same Active Directory.<\/p><p>The steps are as follows:<\/p><ul class=\"wp-block-list\"><li>Open <strong>Command Prompt<\/strong> as administrator and then navigate to the location where the <strong>Exchange2013-x64-cu23.exe<\/strong> file is downloaded.<\/li><li>Then execute the following commands to prepare AD and extend Schema:<\/li><\/ul><pre class=\"wp-block-preformatted\">.\\Exchange2013-x64-cu23.exe \/IAcceptExchangeServerLicenseTerms_DiagnosticDataON \/PrepareSchema<\/pre><figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"218\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/03\/prepareschema-for-CU-23-Exchange-2013-1024x218.png\" alt=\"prepare schema for CU 23 Exchange 2013\" class=\"wp-image-95627 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/03\/prepareschema-for-CU-23-Exchange-2013-1024x218.png 1024w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/03\/prepareschema-for-CU-23-Exchange-2013-300x64.png 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/03\/prepareschema-for-CU-23-Exchange-2013-768x164.png 768w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/03\/prepareschema-for-CU-23-Exchange-2013.png 1366w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure><pre class=\"wp-block-preformatted\">.\\Exchange2013-x64-cu23.exe \/IAcceptExchangeServerLicenseTerms_DiagnosticDataON \/PrepareAD&nbsp; \/OrganizationName:\"&lt;Organization name&gt;\"<\/pre><figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/03\/PrepareAD-for-Exchange-2013-Cumulative-Update-23-1024x576.png\" alt=\"PrepareAD for Exchange 2013 Cumulative  Update 23\" class=\"wp-image-95628 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/03\/PrepareAD-for-Exchange-2013-Cumulative-Update-23-1024x576.png 1024w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/03\/PrepareAD-for-Exchange-2013-Cumulative-Update-23-300x169.png 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/03\/PrepareAD-for-Exchange-2013-Cumulative-Update-23-768x432.png 768w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/03\/PrepareAD-for-Exchange-2013-Cumulative-Update-23.png 1366w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure><p>Once done, move to the next step.<\/p><h3 class=\"wp-block-heading\">Step 3: Put the Exchange Server in Maintenance Mode<\/h3><p>To apply CU23 on your Exchange Server 2013, you must put the server in maintenance mode. The detailed steps are as follows:<\/p><ul class=\"wp-block-list\"><li>You need to put the <strong>HubTransport<\/strong> service to draining state. For this, open <strong>Exchange Management Shell<\/strong> (EMS) and then execute the following command:<\/li><\/ul><p>Set-ServerComponentState -Identity &ldquo;ExchangeServerName&rdquo; -Component HubTransport -State Draining -Requester Maintenance<\/p><ul class=\"wp-block-list\"><li>Now execute the following command to put the Exchange Server 2013 to maintenance mode.<\/li><\/ul><pre class=\"wp-block-preformatted\">Set-ServerComponentState \"ExchangeServerName\" -Component ServerWideOffline -State Inactive -Requester Maintenance<\/pre><figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"963\" height=\"84\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/03\/Set-exchange-server-to-maintenance-mode.png\" alt=\"Set exchange server to maintenance mode\" class=\"wp-image-95629 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/03\/Set-exchange-server-to-maintenance-mode.png 963w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/03\/Set-exchange-server-to-maintenance-mode-300x26.png 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/03\/Set-exchange-server-to-maintenance-mode-768x67.png 768w\" sizes=\"auto, (max-width: 963px) 100vw, 963px\" \/><\/figure><ul class=\"wp-block-list\"><li>You can execute the following command in the EMS to verify if the Exchange Server 2013 is successfully switched to the maintenance mode.<\/li><\/ul><pre class=\"wp-block-preformatted\">Get-ServerComponentState -Identity \"ExchangeServerName&rdquo;<\/pre><figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"612\" height=\"457\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/03\/check-server-component-status-to-verify-maintenance-mode-is-on.png\" alt=\"check server component status to verify maintenance mode is on\" class=\"wp-image-95630 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/03\/check-server-component-status-to-verify-maintenance-mode-is-on.png 612w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/03\/check-server-component-status-to-verify-maintenance-mode-is-on-300x224.png 300w\" sizes=\"auto, (max-width: 612px) 100vw, 612px\" \/><\/figure><h3 class=\"wp-block-heading\">Step 4: Install .Net Framework<\/h3><p>Exchange Server 2013 CU23 requires <a href=\"https:\/\/dotnet.microsoft.com\/download\/dotnet-framework\/net48\">.NET Framework 4.8<\/a>. To install the .NET framework, <a href=\"https:\/\/docs.microsoft.com\/en-us\/exchange\/overview-of-exchange-2013-services-exchange-2013-help\">disable all Exchange 2013 services<\/a> that are currently running.<\/p><p>Then right-click on the .NET framework.exe file and choose Run as administrator. &nbsp;<\/p><p>Once installed, re-enable the services you stooped but do not start them.<\/p><p>You can now reboot the server.<\/p><h3 class=\"wp-block-heading\">Step 5:&nbsp; Upgrade Exchange Server 2013 to CU23<\/h3><p>To upgrade Exchange Server 2013 RTM or later edition to CU23, right-click on the <strong>Exchange2013-x64-cu23.exe<\/strong> file and choose Run as administrator.<\/p><p>Then follow the wizard to install the CU23 update.<\/p><p>You may also run the <strong>Setup.exe<\/strong> in unattended mode to install CU23 on Exchange Server 2013 using an elevated Command Prompt.<\/p><pre class=\"wp-block-preformatted\">.\\Exchange2013-x64-cu23.exe \/IAcceptExchangeServerLicenseTerms_DiagnosticDataON \/m:upgrade<\/pre><p>After the CU23 update is applied, restart the server and reimport your saved customizations.<\/p><h3 class=\"wp-block-heading\">Step 6: Switch Off the Maintenance Mode<\/h3><p>After the successful upgrade to Exchange Server 2013 CU23, you can switch off the maintenance mode by using the following commands:<\/p><pre class=\"wp-block-preformatted\">Set-ServerComponentState &ldquo;ExchangeServerName&rdquo; &ndash;Component ServerWideOffline &ndash;State Active &ndash;Requester Maintenance<\/pre><pre class=\"wp-block-preformatted\">Set-ServerComponentState &ldquo;ExchangeServerName&rdquo; &ndash;Component HubTransport &ndash;State Active &ndash;Requester Maintenance<\/pre><figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"966\" height=\"74\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/03\/turn-off-maintenance-mode-Exchange-2013.png\" alt=\"turn off maintenance mode Exchange 2013\" class=\"wp-image-95631 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/03\/turn-off-maintenance-mode-Exchange-2013.png 966w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/03\/turn-off-maintenance-mode-Exchange-2013-300x23.png 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/03\/turn-off-maintenance-mode-Exchange-2013-768x59.png 768w\" sizes=\"auto, (max-width: 966px) 100vw, 966px\" \/><\/figure><p>Execute the following command to verify that the server is not in maintenance mode.<\/p><pre class=\"wp-block-preformatted\">Get-ServerComponentState &ndash;Identity &ldquo;ExchangeServerName&rdquo;<\/pre><figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"658\" height=\"366\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/03\/confirm-server-is-not-in-maintenance-mode.png\" alt=\"confirm server is not in maintenance mode\" class=\"wp-image-95632 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/03\/confirm-server-is-not-in-maintenance-mode.png 658w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/03\/confirm-server-is-not-in-maintenance-mode-300x167.png 300w\" sizes=\"auto, (max-width: 658px) 100vw, 658px\" \/><\/figure><p>If the output displays &lsquo;<strong>Active<\/strong>&lsquo; Component status, it&rsquo;s out of the maintenance mode. However, if any component is still inactive, you can activate it using the following command:<\/p><p>Set-ServerComponentState &ldquo;ExchangeServerName&rdquo; &ndash;Component &ldquo;ComponentName&rdquo; &ndash;State Active &ndash;Requester Maintenance<\/p><p>Once done, reboot the Exchange Server 2013.<\/p><h3 class=\"wp-block-heading\">Step 7: Install Latest Security Updates<\/h3><p>Finally, you can install the latest Security Updates released by Microsoft for Exchange Server 2013 CU23 and patch the vulnerabilities.<\/p><p>The latest Security Update available at the time of writing this blog was released in January 2023. First, download the <a href=\"https:\/\/www.microsoft.com\/en-us\/download\/details.aspx?familyID=9bcec622-bd02-4557-ad77-4c560abb3da3\">Security Update (KB5008631)<\/a> for Exchange Server 2013 CU23 and then follow these steps to install it.<\/p><ul class=\"wp-block-list\"><li>Open the elevated Command Prompt window and navigate to the location where Security Update is downloaded or located using the <strong>cd<\/strong> command.<\/li><\/ul><pre class=\"wp-block-preformatted\">cd C:\\Users\\Administrator\\Downloads\\<\/pre><ul class=\"wp-block-list\"><li>Then execute the following command to apply the Security Updates:<\/li><\/ul><pre class=\"wp-block-preformatted\">.\\UpdateFileName.msp<\/pre><p>For instance,<\/p><pre class=\"wp-block-preformatted\">.\\Exchange2013- KB5008631-x64-en.msp<\/pre><ul class=\"wp-block-list\"><li>Click &lsquo;<strong>Open<\/strong>&lsquo; and then follow the wizard to apply the Security Updates.<\/li><\/ul><p>You must restart the Exchange Server after applying the Security Updates.<\/p><h3 class=\"wp-block-heading\">Step 8: Verify Exchange Server 2013 CU23<\/h3><p>To check if the Exchange Server is successfully upgraded to CU23, open EMS and execute the following command to check the Exchange Server 2019 build number. If it shows Version 15.0 (Build 15.00), it means the server is successfully updated to CU23.<\/p><p>Get-ExchangeServer | fl Name,Edition,AdminDisplayVersion<\/p><figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"979\" height=\"512\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/03\/verify-the-exchnage-2013-version-to-ensure-CU-23-is-applied.png\" alt=\"verify the exchange 2013 version to ensure CU 23 is applied\" class=\"wp-image-95633 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/03\/verify-the-exchnage-2013-version-to-ensure-CU-23-is-applied.png 979w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/03\/verify-the-exchnage-2013-version-to-ensure-CU-23-is-applied-300x157.png 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2022\/03\/verify-the-exchnage-2013-version-to-ensure-CU-23-is-applied-768x402.png 768w\" sizes=\"auto, (max-width: 979px) 100vw, 979px\" \/><\/figure><p>To check if the January 2023 Security Update is applied, open <strong>Control Panel<\/strong>, go to Programs &gt; Programs and Features, and click<strong> View installed updates.<\/strong><\/p><h2 class=\"wp-block-heading\" id=\"to-wrap-up\">To Wrap Up<\/h2><p>You are now aware of the importance of updating the Exchange Server to the latest Cumulative Update and the process to upgrade your Exchange Server 2013 to the latest CU23 (at the time of writing this blog). However, if the installation fails or you encounter issues after the upgrade, refer to <a href=\"https:\/\/aka.ms\/exupdatefaq\">repair failed installations of Exchange Cumulative and Security updates<\/a> to troubleshoot and fix the problem.<\/p><p>But if the problem is not fixed, your Exchange Server may become unusable. In such a case, use backup to set up a new server and restore the mailboxes. You may also use Exchange recovery software, such as <a href=\"https:\/\/www.stellarinfo.com\/edb-exchange-server-recovery.htm\">Stellar Repair for Exchange<\/a>, to recover mailboxes from failed Exchange Server database and then export them directly to the new Exchange Server. It also helps repair and extracts mailboxes from corrupt or damaged Exchange databases to PST.<\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><a href=\"https:\/\/cloud.stellarinfo.com\/StellarRepairforExchange-B.exe\"><img loading=\"lazy\" decoding=\"async\" class=\"apply-gradient-on-post-images\" src=\"https:\/\/www.stellarinfo.com\/images\/free-download-windows.png\" alt=\"Stellar\" width=\"252\" height=\"72\"><\/a><\/figure><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Microsoft Exchange Servers to the latest Cumulative Updates is highly critical. It&hellip; <a class=\"more-link\" href=\"https:\/\/www.stellarinfo.com\/blog\/install-cumulative-update-cu23-exchange-server-2013\/\">Continue reading <span class=\"screen-reader-text\">How to Install CU23 for Exchange Server 2013?<\/span><\/a><\/p>\n","protected":false},"author":32,"featured_media":96380,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[25],"tags":[],"class_list":["post-95622","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-exchange-server","entry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to Install CU23 for Exchange Server 2013?<\/title>\n<meta name=\"description\" content=\"Cumulative Update 23 or CU23 is the latest build released for Microsoft Exchange Server 2013. 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