September 2023 CU for SharePoint Server 2019 is available for download

The product group released the September 2023 Cumulative Update for SharePoint Server 2019 product family. SharePoint Server 2019 is patched with a language dependent and a language independent fix.

The KB article for September 2023 CU will be available at the following Location in a couple of hours:

  • KB 5002472 – September 2023 Update for SharePoint Server 2019 (language independent)
    This is also a security update!
  • KB 5002471 – September 2023 Update for SharePoint Server 2019 (language dependent)

The downloads for September 2023 CU are available through the following links:

Important: It is required to install both fixes (language dependent and independent) to fully patch a SharePoint server. This applies also to servers which do not have language packs installed. The reason is that each SharePoint installation includes a language dependent component together with a language independent component. If additional language packs are added later (only) the language dependent fix has to be applied again.

It is irrelevant which language you pick on the drop down in download center. Even the language dependent fixes are all in the same package for all languages.

After installing the fixes you need to run the SharePoint 2019 Products Configuration Wizard on each machine in the farm. If you prefer to run the command line version psconfig.exe ensure to have a look here for the correct options.

Please ensure to have a look at the SharePoint Patching Best Practices before applying new fixes.

SharePoint 2019 September 2023 CU Build Number:

Language independent fix: 16.0.10402.20016
Language independent fix: 16.0.10402.20016

Related Links:


  1. Hi Stefan,
    After installed the September 2023 CU for SharePoint Server 2019, we are getting an error on custom user control. The error is “The control type ‘System.Web.UI.WebControls.TemplateField’ is not allowed on this page.”


    1. Hi Rama, which event id does this line have in the ULS log?


      1. Hi, I am having the same issue after updating to September CU on my custom aspx page. There is alot of custom “System.Web.UI.WebControls.XXX is not allowed on this page” error. I have read KB5030804 and managed to fix some of them, however, some does not show up in the ULS logs (ex. ListView). Any recommendations?


  2. We’re getting similar error: System.Web.UI.WebControls.SiteMapPath.
    It was related to custom MasterPage. Sites were inaccessible, so it was reverted to OOTB masterpage. EventID on ULS is “tkau”. System.web.httpexception: The Control type ‘system.web.ui.webcontrols.sitemappath’ is not allowed on this page.


    1. Thanks Samir!
      I would recommend to open a support case with Microsoft to get this analyzed in more details.


  3. Greetings, Stefan. Is there any knowledge of an issue with the “Items That Need Attention” view in the Modern UI that is causing “Something went wrong, Please Try Again or Refresh the page” messages? This all started for us after the August 2023 update. Thanks in advance for your response.


    1. Hi Daniel,
      I haven’t heard about such an issue.
      If you need assistance for this issue, please open a ticket with Microsoft Support to get this investigated.


  4. Hi Stefan,

    Since installing the CU 2 days ago, we are finding that the “SharePoint Server Search 16” service is repeatedly disabling on one of our Search Servers and we are unable to unpause search once patching was finished, preventing Search from working correctly. Have you received many other reports of this?

    This is only happening for one Webapp in this farm. The search service for another WebApp within the farm is functioning without issue.


    1. Hi Jim,
      I double checked and did not find any known issues related to this.
      My recommendation would be to open a ticket with Microsoft if you need assistance to get this resolved.


  5. Hi Stefan

    After installation of the binaries we see a high CPU load, the noderunner processes are consuming 80% CPU.
    I opened a MS Ticket just now.

    Best Regards,


  6. Hi Stefan,

    I installed Sept 2023 update in STG environment and when running configuration Wizard on any of the 6 servers in farm, it kept giving below error:

    An exception of type Microsoft.SharePoint.PostSetupConfiguration.PostSetupConfigurationTaskException was thrown. Additional exception information:
    Failed updating SecurityMode and ProtectionLevel in cluster. [Exception=System.Management.Automation.CmdletInvocationException: Cannot stop AppFabricCachingService service on computer ‘Primary Webserver name’. —> System.InvalidOperationException: Cannot stop AppFabricCachingService service on computer ‘Primary web Server’. —> System.ComponentModel.Win32Exception: The service cannot accept control messages at this time

    I disabled App Fabric Caching Service on Primary Web Server and configuration wizard was able to complete successfully on all 6 servers in our environment. Otherwise all 6 were showing same error as not able to stop the service on Primary web server.

    I will be attempting upgrade in PRD in few days, therefore wanted to check if it is ok to always stop this service before running configuration wizard?

    Thank You!


  7. Dear Stefan, All,

    For those who has MIM portal running on SharePoint Server 2019, after installing September 2023 CU it probably stops working. The MIM portal is throwing the error:

    Sorry, something went wrong
    The control type ‘System.Web.UI.HtmlControls.HtmlAnchor’ is not allowed on this page.

    There are some new requirements for deploying SharePoint 2019 and MIM. And the solition is to run a powershell script mentioned in the article –

    $f = get-spfarm


    Thank you.


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