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Cumulative Update 11 for Exchange Server 2019

Microsoft released Cumulative Update 11 for Exchange Server 2019 (KB5005334) on September 24, 2021. Also known as Exchange Server 2019 CU11. This Cumulative Update 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.

How to update Exchange Server 2019 to CU11?

It’s recommended to update the Exchange Server in the lab environment before updating it in the production environment.

  1. Download Cumulative Update CU11 for Exchange Server 2019 (KB5005334)
  2. Update to Microsoft .NET Framework 4.8
  3. Install Exchange Cumulative Update

Cumulative Update CU11 for Exchange Server 2019 is released as version 15.02.0986.005. Which version are you running now? Read more on how to find your Exchange version build number.

Cumulative Update 11 for Exchange Server 2019 download

Cumulative Update Setup Changes

There are two important changes starting with Exchange Server 2019 CU11 and higher.

The previous /IAcceptExchangeServerLicenseTerms switch will not work. You now must use one of these switches for unattended and scripted installs:

  • /IAcceptExchangeServerLicenseTerms_DiagnosticDataON
  • /IAcceptExchangeServerLicenseTerms_DiagnosticDataOFF

The IIS URL Rewrite module is now a prerequisite for Exchange Server installation. This must be installed separately and is not installed as part of Exchange Setup (you need the x64 MSI version). Please note that app pools are restarted as a part of the IIS Rewrite module installation, and service might be disrupted.

Known issues in Cumulative Update 11

In multidomain Active Directory forests in which Exchange is installed or has been prepared previously by using the /PrepareDomain option in Setup, this action must be completed after the /PrepareAD command for this cumulative update has been completed and the changes are replicated to all domains. Setup will try to run the /PrepareAD command during the first server installation. Installation will finish only if the user who initiated Setup has the appropriate permissions.

Issues fixed in Cumulative Update 11

This Cumulative Update fixes the issues that are described in the following Microsoft Knowledge Base articles:

  • 5006980 Bad signature error using PerfView in Exchange Server 2019 and 2016
  • 5006982 On-premises Exchange queues back up because of incorrect default value
  • 5006983 Exchange Server 2019 and 2016 certificates created during setup use SHA-1 hash
  • 5006984 PrepareAD fails if Computers container or RODCs are renamed or moved in Exchange Server 2019 and 2016
  • 5006986 Opening an Outlook message from the desktop removes line spacing
  • 5006988 Export of .pst file is unexpectedly triggered again in Exchange Server 2019 and 2016
  • 5006989 Accepted domains with wildcards for subdomains are not honored when Edge server maps AddressSpaces
  • 5006990 Exchange CU installation fails after you configure fallback to use default character set
  • 5006991 Mail quota warning messages no longer sent daily in Exchange Server 2019
  • 5006992 No room lists found when trying to add a room in OWA in Exchange Server 2019 or 2016
  • 5006993 Can’t log on to OWA in Chrome if SSL is offloaded in Exchange Server 2019 and 2016
  • 5006994 BCC values not retained in Sent Items in a shared mailbox in Exchange Server 2019 and 2016
  • 5006995 Korean email messages display some recipients incorrectly in Exchange Server 2019 and 2016
  • 5006996 Export-AutoDiscoverConfig exposes admin password and does not work against domain controllers that require signing
  • 5006997 Korean messages in OWA display “From” as “Start date” after you filter the list in Exchange Server 2019 and 2016
  • 5006999 “401” error and Outlook repeatedly prompts for credentials in Exchange Server 2019
  • 5007042 Error window appears when you view features in OWA Virtual Directory
  • 5007043 Exchange Server SU updates Add/Remove Programs incorrectly
  • 5007044 Start-MailboxAssistant not available in EMS in Exchange Server 2019

File hash information

  • File name: ExchangeServer2019-x64-cu11.iso
  • SHA256 hash: 79F87AAD53E9A633291ADDEFB14DB574BACB673C784CED67C606A7356D215771
ALI TAJRAN

ALI TAJRAN

ALI TAJRAN is a passionate IT Architect, IT Consultant, and Microsoft Certified Trainer. He started Information Technology at a very young age, and his goal is to teach and inspire others. Read more »

This Post Has 7 Comments

  1. Hey Ali,
    I got really stuck. Trying to move from 2019 CU7 to CU11 but keep getting the error.

    ErrorRecord: Microsoft.Exchange.Configuration.Tasks.TaskException: Process execution failed with exit code 50.
    at Microsoft.Exchange.Management.Tasks.RunProcessBase.InternalProcessRecord()
    at Microsoft.Exchange.Configuration.Tasks.Task.b__91_1()
    at Microsoft.Exchange.Configuration.Tasks.Task.InvokeRetryableFunc(String funcName, Action func, Boolean terminatePipelineIfFailed)
    [01/28/2022 18:29:05.0971] [1] [ERROR] The following error was generated when “$error.Clear();
    $CommandAppCmd = join-path $env:SystemRoot System32\inetsrv\appcmd.exe;
    $imagePath = [System.IO.Path]::Combine($RoleInstallPath, “FrontEnd\HttpProxy\bin\exppw.dll”);
    Start-SetupProcess -Name “$CommandAppCmd” -args “install module /name:cafe_exppw /image:`”$imagePath`” /add:false” -IgnoreExitCode @(183);
    Start-SetupProcess -Name “$CommandAppCmd” -args “add module /name:cafe_exppw /app.name:`”Default Web Site/owa`”” -IgnoreExitCode @(183);
    ” was run: “Microsoft.Exchange.Configuration.Tasks.TaskException: Process execution failed with exit code 50.
    at Microsoft.Exchange.Management.Tasks.RunProcessBase.InternalProcessRecord()
    at Microsoft.Exchange.Configuration.Tasks.Task.b__91_1()
    at Microsoft.Exchange.Configuration.Tasks.Task.InvokeRetryableFunc(String funcName, Action func, Boolean terminatePipelineIfFailed)”.
    [01/28/2022 18:29:05.0972] [1] [ERROR] Process execution failed with exit code 50.
    [01/28/2022 18:29:05.0972] [1] [ERROR-REFERENCE] Id=CafeComponent___4f97548ee3da4452ac5da213b5e92bc6 Component=EXCHANGE14:\Current\Release\Shared\Datacenter\Setup

    I never had issues upgrading up until CU7. SetupAssistant.ps1 is saying the following :
    Do the following action plan:

    Look at the action plan from ‘Virtual Directory Configuration’ test from above.

    If this doesn’t resolve your issues, please let us know at ExToolsFeedback@microsoft.com

    But since installation has failed I cannot start EMS anymore .
    Anything you can do to help. Thank you

  2. Hi Dear Ali,

    we have exchange 2019 server CU 1, i need to update CU11, i can update direct 1 to 11?

    or need to split installation 1 by 1????

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