What's New in Cumulative Update 23 for Exchange Server 2016? Download and Learn
How to Download and Install the Latest Exchange 2016 CU
If you are running Exchange Server 2016, you may want to keep your server up to date with the latest Cumulative Update (CU). A CU is a full installation of Exchange that includes updates and changes from all previous CUs, as well as fixes for security and nonsecurity issues. Updating your Exchange server to the latest CU can help you improve its performance, security, and functionality. In this article, we will show you how to download and install the latest Exchange 2016 CU step by step.
download latest exchange 2016 cu
What is an Exchange 2016 CU and why you should update it
An Exchange 2016 CU is a package of updates that contains all the changes that have been made to Exchange since the previous CU. Microsoft releases CUs for Exchange 2016 twice a year, in H1 and H2. Each CU is supported for a period of time, usually until the next two CUs are released. For example, if the latest released CU is CU23, then Microsoft supports two Exchange 2016 CUs, CU23 and CU22. When CU24 is released, CU22 will become unsupported.
Benefits of updating Exchange 2016 CU
Updating your Exchange server to the latest CU can bring you several benefits, such as:
Enhancing the security of your server by applying the latest patches and mitigations for potential threats.
Fixing any bugs or issues that may affect your server's functionality or performance.
Adding new features or improvements that may enhance your server's capabilities or user experience.
Updating the daylight saving time (DST) settings for your server's time zone.
Common issues and solutions for Exchange 2016 CU
Although updating your Exchange server to the latest CU is recommended, you may encounter some issues or errors during or after the installation process. Here are some common issues and solutions for Exchange 2016 CU:
The MSExchangeServiceHost service crashes repeatedly and Event ID 4999 is logged in the Windows Application event log. This issue may occur after installing March 2022 security update. To resolve this issue, see .
The Get-MailboxDatabaseCopyStatus cmdlet from an Exchange Server 2013 server fails against databases on Exchange Server 2019 and 2016 servers and returns Error 0xe0434352 from RpccGetCopyStatusEx4. To resolve this issue, run Get-MailboxDatabaseCopyStatus from an Exchange Server 2019 or 2016 server.
Checking the Exchange Server 2019 or 2016 database status from the Exchange admin center (EAC) might fail and return an "HTTP 500" or "Your request couldn't be completed. Please try again in a few minutes" error message. To resolve this issue, make sure that the admin mailbox is on an Exchange Server 2019 or 2016 server. If the admin account has no mailbox, make sure that all arbitration mailboxes (especially the SystemMailbox bb558c35-97f1-4cb9-8ff7-d53741dc928c) are on an Exchange Server 2019 or 2016 server.
How to download the latest Exchange 2016 CU
To download the latest Exchange 2016 CU, you need to follow these steps:
Check the prerequisites and release notes
Before you download any CUs for your Exchange server, you should check the prerequisites and release notes for the CU. The prerequisites may include installing the latest Windows updates, .NET Framework, Visual C++ Redistributable Package, and other components. The release notes may contain important information about the CU, such as new features, known issues, and supported scenarios. You can find the prerequisites and release notes for the latest Exchange 2016 CU on the .
Download Cumulative Update 23 for Exchange Server 2016 (KB5011155)
How to install latest CU for Exchange 2016
Exchange Server 2016 cumulative update download links
Exchange 2016 CU23 release notes and fixes
Exchange 2016 latest update version and build number
Exchange Server 2016 CU23 prerequisites and requirements
Exchange 2016 CU23 installation guide and steps
Exchange 2016 CU23 known issues and problems
Exchange 2016 CU23 new features and improvements
Exchange 2016 CU23 compatibility and coexistence
Exchange 2016 CU23 backup and restore best practices
Exchange 2016 CU23 troubleshooting and support
Exchange 2016 CU23 security and performance enhancements
Exchange 2016 CU23 offline installer and ISO download
Exchange 2016 CU23 schema and AD preparation
Exchange 2016 CU23 hybrid configuration and migration
Exchange 2016 CU23 DAG and high availability
Exchange 2016 CU23 mailbox database and server roles
Exchange 2016 CU23 PowerShell cmdlets and scripts
Exchange 2016 CU23 EAC and ECP access issues
Exchange 2016 CU23 UM voicemail greetings error
Exchange 2016 CU23 email stuck in queue issue
Exchange 2016 CU23 Get-MailboxDatabaseCopyStatus error
Exchange 2016 CU23 Get-EmailAddressPolicy exception
Exchange 2016 CU23 iPhone mail attachment issue
Download latest exchange server 2016 cumulative update from Microsoft website
Download latest exchange server 2016 cumulative update from third-party sources
Download latest exchange server 2016 cumulative update for free
Download latest exchange server 2016 cumulative update without registration
Download latest exchange server 2016 cumulative update with crack or keygen
Download latest exchange server 2016 cumulative update for Windows Server 2019 or 2022
Download latest exchange server 2016 cumulative update for Linux or Mac OS
Download latest exchange server 2016 cumulative update for virtual machines or cloud platforms
Download latest exchange server 2016 cumulative update for testing or evaluation purposes
Download latest exchange server 2016 cumulative update for production or live environments
How to download latest exchange server 2016 cumulative update faster or easier
How to download latest exchange server 2016 cumulative update safely or securely
How to download latest exchange server 2016 cumulative update automatically or manually
How to download latest exchange server 2016 cumulative update in different languages or regions
How to download latest exchange server 2016 cumulative update with different browsers or download managers
Download the CU from Microsoft
After you have checked the prerequisites and release notes, you can download the CU from Microsoft. The latest Exchange 2016 CU is CU23, which was released on March 16, 2023. You can download it from the . The file size is about 6.5 GB, so make sure you have enough disk space and bandwidth to download it.
Mount the CU ISO image file
Once you have downloaded the CU file, you need to mount it as an ISO image file on your Exchange server. You can use any tool that can mount ISO files, such as Windows Explorer, PowerShell, or third-party software. To mount the CU ISO file using Windows Explorer, follow these steps:
Right-click the CU file and select Properties.
On the General tab, click Unblock and then click OK.
Right-click the CU file again and select Mount.
Note the drive letter that is assigned to the mounted ISO file.
How to install the latest Exchange 2016 CU
To install the latest Exchange 2016 CU, you need to follow these steps:
Run the setup wizard or use unattended setup from the command line
You can install the CU using either the setup wizard or the unattended setup from the command line. The setup wizard is a graphical user interface (GUI) that guides you through the installation process. The unattended setup is a command-line interface (CLI) that allows you to specify various parameters and options for the installation. Both methods require administrative privileges and will stop and restart all Exchange services during the installation.
To run the setup wizard, follow these steps:
Open Windows Explorer and navigate to the drive letter where you mounted the CU ISO file.
Double-click Setup.exe to launch the setup wizard.
On the Check for Updates page, select whether you want to connect to the internet and check for updates or not. It is recommended that you check for updates to get the latest fixes and improvements for Exchange.
On the Introduction page, review the information and click Next.
On the License Agreement page, accept the license terms and click Next.
On the Readiness Checks page, wait for the setup to perform various checks and resolve any issues that may prevent the installation. Click Next.
On the Upgrade page, click Upgrade to start installing the CU.
On the Completion page, review the summary and click Finish.
To use unattended setup from the command line, follow these steps:
Open a command prompt as an administrator and navigate to the drive letter where you mounted the CU ISO file.
Type the following command and press Enter:Setup.exe /Mode:Upgrade /IAcceptExchangeServerLicenseTerms
Wait for the setup to complete and close the command prompt.
Restart the server and verify the installation
After you have installed the CU, you need to restart your Exchange server and verify that the installation was successful. To do this, follow these steps:
Restart your Exchange server and log in as an administrator.
Open the Exc