How to Download Exchange 2019 CU 12
If you are using Exchange Server 2019, you might want to update it to the latest cumulative update (CU) available. In this article, we will explain what is Exchange 2019 CU 12, why you should install it, and how to download it from two different sources: Microsoft Download Center and Microsoft Update Catalog.
download exchange 2019 cu 12
What is Exchange 2019 CU 12?
Exchange 2019 CU 12 is the twelfth cumulative update for Exchange Server 2019. It was released on April 20, 2022, and 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 .
This update also includes new daylight saving time (DST) updates for Exchange Server 2019. For more information about DST, see .
New features in this cumulative update
To prevent misuse of UNC paths by attackers, parameters that take UNC paths as inputs will no longer be usable in Exchange Server PowerShell cmdlets or the Exchange Admin Center. For more information, see the following Knowledge Base article: .
Known issues in this cumulative update
There are some known issues that you might encounter after installing this cumulative update. Here are some of them:
The MSExchangeServiceHost service crashes repeatedly and Event ID 4999 is logged in the Windows Application event log. For more information, 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. The workaround is to 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. The workaround is to 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.
The Get-EmailAddressPolicy cmdlet fails and returns "Microsoft.Exchange.Diagnostics.BlockedDeserializeTypeException."
"Cannot Send Mail - Your mailbox is full" error when you use iPhone mail to send very large attachments. For more information, see .
Issues that this cumulative update fixes
This cumulative update also fixes the issues that are described in the following Microsoft Knowledge Base articles:
How to download Exchange 2019 CU 12 from Microsoft Download Center
If you want to download Exchange 2019 CU 12 from Microsoft Download Center, you can follow these steps:
Prerequisites and system requirements
Before you download and install Exchange 2019 CU 12, make sure that you meet the following prerequisites and system requirements:
You must have Exchange Server 2019 installed on your computer.
You must have the latest servicing stack update (SSU) for your version of Windows installed. To find the latest SSU, see .
You must have enough disk space to extract and install the update. For more information, see .
You must have a valid license key for Exchange Server 2019. To obtain a license key, see .
You must restart your computer after installing the update.
Installation instructions
To install Exchange 2019 CU 12 from Microsoft Download Center, follow these steps:
How to download and install cumulative update 12 for exchange server 2019
Exchange server 2019 cu 12 download link and installation guide
What's new in exchange server 2019 cumulative update 12 (KB5011156)
Exchange 2019 cu 12 release notes and known issues
Exchange server 2019 cu 12 prerequisites and system requirements
Exchange server 2019 cu 12 offline installer download
Exchange server 2019 cu 12 iso image download from Microsoft
Exchange server 2019 cu 12 update failed or stuck - how to fix
Exchange server 2019 cu 12 security fixes and improvements
Exchange server 2019 cu 12 new features and enhancements
How to upgrade exchange server 2019 to cu 12 using the setup wizard
Exchange server 2019 cu 12 installation error codes and troubleshooting tips
Exchange server 2019 cu 12 compatibility with other exchange versions and windows server versions
Exchange server 2019 cu 12 performance and stability issues - how to resolve
Exchange server 2019 cu 12 backup and restore best practices
How to uninstall or rollback exchange server 2019 cu 12
Exchange server 2019 cu 12 support lifecycle and end of support date
Exchange server 2019 cu 12 vs exchange server 2016 cu 21 - which one to choose
Exchange server 2019 cu 12 hybrid deployment with office 365 - how to configure
Exchange server 2019 cu 12 coexistence with exchange online - how to enable
How to verify exchange server 2019 cu 12 installation and version number
Exchange server 2019 cu 12 schema update and active directory preparation steps
Exchange server 2019 cu 12 mailbox database size limit and quota settings
Exchange server 2019 cu 12 high availability and disaster recovery options
Exchange server 2019 cu 12 transport rules and message tracking features
How to apply exchange server 2019 cu 12 to multiple servers in a DAG
Exchange server 2019 cu 12 certificate management and renewal process
Exchange server 2019 cu 12 mail flow and routing configuration
Exchange server 2019 cu 12 outlook client compatibility and connectivity issues
Exchange server 2019 cu 12 autodiscover and DNS settings
How to enable exchange server 2019 cu 12 dark mode in EAC and OWA
Exchange server 2019 cu 12 public folder migration and management tools
Exchange server 2019 cu 12 PowerShell cmdlets and scripts
Exchange server 2019 cu 12 antivirus and antispam solutions
Exchange server 2019 cu 12 monitoring and reporting tools
How to test exchange server 2019 cu 12 functionality and performance before deployment
Exchange server 2019 cu 12 best practices analyzer and health check tool
Exchange server 2019 cu
Go to the .Click the Download button and save the file to your computer.
Double-click the file to extract the contents to a folder of your choice.
Open an elevated command prompt and navigate to the folder where you extracted the files.
Run the following command to install the update: Setup.exe /IAcceptExchangeServerLicenseTerms /m:upgrade
Wait for the installation to complete and restart your computer if prompted.
Verification steps
To verify that you have successfully installed Exchange 2019 CU 12, follow these steps:
Open Exchange Management Shell and run the following command: Get-ExchangeServer Format-List Name, Edition, AdminDisplayVersion
Check that the AdminDisplayVersion value is 15.2.986.12.
Open Exchange Admin Center and check that the build number is 15.02.0986.012.
How to download Exchange 2019 CU 12 from Microsoft Update Catalog
If you want to download Exchange 2019 CU 12 from Microsoft Update Catalog, you can follow these steps:
Prerequisites and system requirements
The prerequisites and system requirements for downloading Exchange 2019 CU 12 from Microsoft Update Catalog are the same as for downloading it from Microsoft Download Center, except that you also need an internet connection and a web browser that supports Microsoft Update Catalog.
Installation instructions
To install Exchange 2019 CU 12 from Microsoft Update Catalog, follow these steps:
Go to the .Click the Download button next to the update that matches your system architecture (x64).
Save the file to your computer and double-click it to run the installer.
Follow the on-screen instructions to complete the installation and restart your computer if prompted.
Verification steps
The verification steps for installing Exchange 2019 CU 12 from Microsoft Update Catalog are the same as for installing it from Microsoft Download Center.
Conclusion
In this article, we have shown you how to download Exchange 2019 CU 12 from two different sources: Microsoft Download Center and Microsoft Update Catalog. We have also explained what is Exchange 2019 CU 12, why you should install it, and what are the new features, known issues, and fixed issues in this cumulative update. We hope that this article has been helpful and informative for you. If you have any questions or feedback, please feel free to leave a comment below.
FAQs
Here are some frequently asked questions about Exchange 2019 CU 12:
Q: How do I uninstall Exchange 2019 CU 12?
A: You cannot uninstall Exchange 2019 CU 12 or any other cumulative update for Exchange Server 2019. The only way to revert to an earlier version of Exchange Server 2019 is to restore your server from a backup that was taken before you installed the cumulative update.
Q: How do I update multiple Exchange servers in my organization?
A: You can use the following best practices to update multiple Exchange servers in your organization:
Update your servers in the following order: edge transport servers, mailbox servers, and then any other servers in your organization.
Update all your servers within the same Active Directory site before moving to another site.
Update all your servers within the same DAG before moving to another DAG.
Update all your servers that host the same role before moving to another role.
Use a load balancer or a DNS round robin to redirect client traffic away from the server that you are updating.
Test the functionality of your server after updating it before moving to another server.
Q: How do I check for new updates for Exchange Server 2019?A: You can check for new updates for Exchange Server 2019 by using one of the following methods:
Visit the page and look for the latest cumulative update for Exchange Server 2019.
Use Windows Update or Microsoft Update to automatically download and install the latest cumulative update for Exchange Server 2019.
Use the Exchange Server Health Checker script to scan your Exchange servers and report any issues or missing updates. For more information, see .
Q: How do I troubleshoot any issues that might occur after installing Exchange 2019 CU 12?
A: If you encounter any issues after installing Exchange 2019 CU 12, you can try the following troubleshooting steps:
Check the Exchange Setup log files for any errors or warnings. The log files are located in the %ExchangeInstallPath%\Logging\Setup folder.
Check the Windows Application event log for any events related to Exchange Server or the cumulative update.
Run the Test-ServiceHealth cmdlet in Exchange Management Shell to check the status of the Exchange services.
Run the Test-ExchangeServerHealth.ps1 script in Exchange Management Shell to check the health and performance of your Exchange server. For more information, see .
Contact Microsoft Support for further assistance.
Q: Where can I find more information about Exchange 2019 CU 12?A: You can find more information about Exchange 2019 CU 12 by visiting the following resources:
I hope that this article has answered all your questions about how to download Exchange 2019 CU 12. If you have any feedback or suggestions, please let me know in the comments section below. Thank you for reading and have a great day! 44f88ac181
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