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How to Upgrade to Cumulative Update 12 for Exchange Server 2019

Cumulative Update 12 for Microsoft Exchange Server 2019 was released on April 20, 2022. It includes fixes for nonsecurity issues and all previously released fixes for security and nonsecurity issues. These fixes will also be included in later cumulative updates for Exchange Server 2019.

A component that's used within Exchange Server requires a new Visual C++ component to be installed together with Exchange Server. This prerequisite can be downloaded at Visual C++ Redistributable Package for Visual Studio 2012.

download exchange 2019 cu 12

After you install this cumulative update package, you can't uninstall the package to revert to an earlier version of Exchange Server 2019. If you uninstall this cumulative update package, Exchange Server 2019 is removed from the server.

For more information about the deployment of Exchange Server 2019, see Release notes for Exchange Server 2019.For more information about the coexistence of Exchange Server 2019 and earlier versions of Exchange Server in the same environment, see Exchange Server 2019 system requirements.For more information about other Exchange updates, see Exchange Server Updates: Build numbers and release dates.

To get the latest version of Exchange 2019, download and install Cumulative Update 13 for Exchange Server 2019. Each CU is a full installation of Exchange that includes all updates and changes from previous CUs. When installing a new Exchange server using the latest released CU, you don't need to install Exchange RTM or any previously released CU.

To get the latest version of Exchange 2016, download and install Cumulative Update 23 for Exchange Server 2016. Because each CU is a full installation of Exchange that includes updates and changes from all previous CUs, you don't need to install any previous CUs or Exchange 2016 RTM first.

The Exchange product group released March updates for Exchange Server 2013, 2016 and 2019. Be advised that the Exchange team also put out a notice for fixed vulnerability in Outlook (CVE-2023-23397), together with a supporting script to analyze mailboxes for this possible exploit (link), which is rather uncommon.

When it comes to Active Directory, only Exchange 2019 CU12 supports Windows 2022 Domain Controllers. Exchange 2016 and Exchange 2013 do not support Windows 2022 Domain Controllers (despite earlier communication from Microsoft). For more information regarding supportability check the Exchange Supportability Matrix.

How to download and install cumulative update 12 for exchange server 2019

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Exchange server 2019 cu

One of the new features of Windows 2022 is support for TLS 1.3 and several of my clients have a requirement for this. Unfortunately, Exchange 2019 still does not support TLS 1.3 and support for TLS 1.3 is expected by the end of this year.

Today we are announcing the availability of Cumulative Updates (CUs) for Exchange Server 2016 and Exchange Server 2019. These CUs include fixes for customer reported issues along with all previously released Security Updates (SUs), including the updates released in the March 2022 SUs. A full list of fixes is contained in the KB article for each CU, but we also want to highlight some important changes.

The next CU will be released in H2 of 2022, and it will be for Exchange Server 2019 only; mainstream support has ended for Exchange Server 2013 and Exchange Server 2016. We will release SUs as needed while those versions are in extended support.

Today, we are excited to announce that Exchange Server 2019 CU12 includes an updated Exchange Management Tools role designed to address the specific customer scenario where an Exchange server is run only because of recipient management requirements.

The updated Management Tools role eliminates the need to have a running Exchange server for recipient management in this scenario. If you have only a single Exchange server that you use only for recipient management, you can install the updated tools on a domain-joined workstation, shut down your last Exchange server, and manage recipients using Windows PowerShell. For more information, see Manage recipients in Exchange Server 2019 Hybrid environments.

By default, Windows Server 2022 uses Transport Layer Security (TLS) 1.3, the latest version of the Internet's most deployed security protocol. TLS 1.3 encrypts data to provide a secure communication channel between two endpoints. It eliminates obsolete cryptographic algorithms, enhances security over older versions, and aims to encrypt as much of the handshake as possible. Support for TLS 1.3 will be added to Exchange Server 2019 in 2023.

I recently started supporting a client with an Exchange 2019 installation. I noticed that none of the CU updates have been applied to the server. I would like to start the process of updating to CU1 and going to CU10.

I'm aware of the website Opens a new window, and I was able to download CU9 and CU10, but from my understanding, I need to update one at a time, so I need access to CU1 to CU8. When I click those links, it brings me to VLSC, but there are no links that I can see to download them.

Software updates are critical as they bring new features, fix bugs, and patch vulnerabilities that threat actors may exploit to gain unauthorized access. Microsoft releases Security Updates (SUs) monthly and Cumulative Updates (CUs) for supported Exchange Server versions, such as Exchange 2013, 2016, and 2019, every quarter.

Below we have explained the complete process of downloading and applying the latest Cumulative Updates released by Microsoft for supported Exchange Server versions with step-by-step instructions. You can follow this guide to apply the Cumulative Updates to Exchange Server 2013, 2016, and 2019.

Then visit Exchange Server build numbers and release dates page to check and download the latest Cumulative Update for your Exchange Server Version. Never download any security or cumulative updates from third-party or unofficial sites as they may contain malware.

It is recommended to put Exchange Server in maintenance mode before updating or upgrading it. You can use the following PowerShell commands in Exchange Management Shell (EMS) to put your Exchange Server 2013, 2016, or 2019 into maintenance mode.

With this release of Exchange 2016 and 2019, changes have been made to the servicing model. The number of CUs that will be released in a given calendar year will be reduced to two. This will be a H1 and H2 release which will ship approximately in April and October. Exact dates may vary. There will still be security releases to address those issues. Reducing the CUs to two per year allows a longer coexistence period and less work for admins overall to keep on-premises Exchange updated. The next CU for Exchange 2019 will be the H2 release later this year.

Exchange 2019 CU12 has multiple new additional features that were also announced today. Perhaps the most anticipated was a mechanism to remove the last Exchange server when all mailboxes are in Exchange Online. Note that there are a series of caveats with this, and needs to be fully explored. Will do an additional post on this in the near future. Please refer to Manage recipients in Exchange Server 2019 Hybrid environments.

Support is added for Windows Server 2022. This allows Exchange 2019 to be installed onto the Windows Server 2022 platform. CU12 also adds support for Windows Server 2022 DCs. Please review the exact details in the Exchange Server supportability matrix.

On the topic of Windows 2022, this adds an interesting issue for TLS. Windows Server 2022 uses TLS 1.3 by default and this is not currently supported by Exchange 2019. Support will be added in a subsequent CU in 2023.


Free download Microsoft Exchange Server 2019 CU12 full version standalone offline installer for Windows PC, Microsoft Exchange Server or Microsoft Exchange Server is a product specialized in messaging and collaborative software developed by Microsoft. It is part of the Microsoft Server product line and is widely used in projects that use Microsoft as an infrast

Exchange Server 2019 requires Windows Server 2019. In fact, it is recommended installing Exchange Server 2019 onto Windows Server 2019 Server Core. Exchange Server 2019 installed on Windows Server 2019 Core provides the most secure platform for Exchange. You also have the option of installing Exchange 2019 onto Windows Server 2019 with Desktop Experience.When customers can try it out, Exchange Server 2019 is said to run better on multi-core systems with plenty of memory. Microsoft said the new Exchange can use up to 48 processor cores and 256 gigabytes of RAM.Exchange Server 2019 can also cache data on solid-state storage for fast access. It will also allocate more memory to active database copies when cacheing data, for improved performance.Database failovers are faster in Exchange Server 2019, using Bing-based search technology and overall, Microsoft promises that the new version of its communications platform can handle more users per server than before.On the security side, Microsoft has cleaned out old ciphers and hashing algorithms and Exchange Server 2019 will only use the Transport Layer Security 1.2 protocol out of the box, which might restrict support for legacy systems.

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