Updates for SharePoint Server 2019 (September 2021 CU)

A new cumulative update has been released for SharePoint Server 2019 (September 2021 CU).

SP Build:
16.0.10378.20002 (Language independent CU)
16.0.10378.20002 (Language dependent CU)

SharePoint 2019 CU – KB articles describing the CU:

• KB 5002018 – September 2021 Update for SharePoint Server 2019 (language independent)
  
• KB 5002019 – September 2021 Update for SharePoint Server 2019 (language dependent)
• KB 5001999 – September 2021 Update for Office Online Server

SharePoint Server 2019 CU – CU download link:

• Download September 2021 Update for SharePoint Server 2019 (language independent)
• Download September 2021 Update for SharePoint Server 2019 (language dependent)
• Download September 2021 Update for Office Online Server

After installation, remember to run the SharePoint 2019 configuration wizard (SharePoint 2019 Products Configuration Wizard), or the following command:

PSConfig.exe -cmd upgrade -inplace b2b -wait -cmd applicationcontent -install -cmd installfeatures -cmd secureresources -cmd services -install

Important

Always install both packages in this order:

1. language independent (updates language-independent components)
2. language dependent (updates language-dependent components)

For language-dependent packages (language dependent), it does not matter which language you select, because each package contains updates for all languages.

If you install a new language pack on a SharePoint Server 2019 farm, you must subsequently reinstall the language-dependent package (language dependent).

Remember that, in addition to SharePoint, the Distributed Cache service must also be updated; see How to update Distributed Cache correctly and, for Office Online Server, you must have the current RTM version; see  How to update Office Online Server.

Included fixes and improvements

The list of fixes and improvements in this CU consists of excerpts from official Microsoft KB articles in their original language (EN).

SharePoint Server 2019

This security update contains fixes and improvements for the following nonsecurity issues in SharePoint Server 2019:

• Fixes an issue in which the Appinv.aspx page can‘t be displayed in an iFrame. After you apply this update, you can follow the steps that are provided in KB 5005546 to add the trusted domains to the AllowIframeAppAuthorizePageDomains in the farm to be able to display the Appinv.aspx page in an iFrame.

• Fixes an issue in which you can’t get all the comments by selecting the Show More Comments link in a communication site page.

• Fixes an issue in which you can’t open a Visio file when you use the Document IDs feature.

• Fixes the Workflow Auto Cleanup timer job execution issue that causes significant blocking in the database. This issue causes the sites that are listed in that database to become unavailable.

• Fixes an issue in which you can’t use SQL Server authentication to create a SharePoint service application.

• Enables you to create a subsite that has broken inheritance in a specific Active Directory or People Picker configuration. After you apply this update, you can follow the steps that are provided in KB 5005835 to set the property of WebApplication.

• Fixes an issue in which the managed properties for search results are truncated for the file that has a number sign (#) in its file name in the intranet zone.

• Fixes an issue in which Web Parts that depend on WPProperty don’t work correctly. To enable the Web Parts to work, you have to also follow the steps that are provided in KB 5003528 to declare the affected .NET types to be allowed to access WPProperty in the Web.config file.

This update also contains fixes for the following issues. To fix these issues completely, you have to install KB 5002019 together with this update.

• Fixes an accessibility issue where the keyboard focus boundary not showing completely for the Type, Name, Modified, and Modified by column controls when the All Documents view option is set to Tiles.

• Fixes an issue in which an unexpected authentication prompt appears when a user who has only the Read permission tries to add a page to the navigation in modern user interface (UI).

• Fixes an issue in which the Remove button that’s used to remove user permissions is visible to the user who doesn’t have the appropriate permission.