Updates for SharePoint Server 2019 (August 2020 CU)

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

• The accessibility experience of the SharePoint App Launcher has been improved for better integration with assistive technologies.
• Friendly URLs aren’t crawled through incremental or continuous crawls.
• Corrects the wrong time format of yyyy-MM-ddTHH:mm:ssZ when a calculated column value is displayed in a list view that is configured by having the Expanded option for its Group By setting.
• Fixes an issue in which manager information is missing when you use an external identity manager.
• Fixes an issue in which the role of Site-Brand-Bar is incorrect.
• The OneDrive sync app supports push notification and polling as two different mechanisms to discover changes in the documents that it syncs. Push notification is preferred because it allows SharePoint to notify the OneDrive sync app of changes in real time. This eliminates the computational cost of scanning for changes at regular intervals.

  Push notification requires both the OneDrive sync app and the SharePoint farm to have network connectivity to Windows Push Notification Services (WNS) in the cloud. If the OneDrive sync app cannot establish a push notification relationship with the SharePoint farm and WNS, it uses polling instead. Polling scans for changes in documents at regular intervals.

  SharePoint farm administrators can now control how often the OneDrive sync app scans for changes in a web application when they use the polling mechanism. Use the following PowerShell commands on the SharePoint server to modify the polling interval:

  $webapp = Get-SPWebApplication <web application URL>
  $syncpolicy = $webapp.SyncPolicySettings
  $syncpolicy.BackgroundPollShortIntervalSecondsStart = <minimum polling interval in seconds>
  $syncpolicy.BackgroundPollShortIntervalSecondsEnd = <maximum polling interval in seconds>
  $syncpolicy.Update()

  Note Test modifications to the polling interval to make sure that your production environment has sufficient capacity to handle the changes in the computational load. Microsoft recommends that you use push notification instead of polling, if it is possible.

This security update also fixes the following issues. To fix these issues completely, you have to install KB 4484471 together with this update:

• The view name does not change when you use Group By.
• Adding a document link does not return you to the library.
• A multichoice person column is not displayed correctly in modern view.
• The Aria-labelledby attribute value is invalid.
• The home page title is not descriptive enough.
• A banner landmark must not be contained inside another landmark.
• The title of Frame is missing in Create Site.
• If a user navigates to a custom list and opens the Links list in JAWS by using the Alt+F7 keyboard shortcut to see all links on the page, each item in the custom list shows the Open Menu link to open the Edit Control Block (ECB) menu. In this situation, it is not possible to determine which item each link belongs to.

This security update contains fixes for the following nonsecurity issues in Project Server 2019:

• Sites that have many timesheets or timesheet views may experience a time-out when you create or modify timesheet views. This may make it impossible to create timesheets or open existing timesheets.
• When you follow a procedure to link a project task to an Issue or Risk within the Asset Picker table, items such as Issues, Documents, Tasks, and Deliverables are missing.

This security update contains fixes for the following issues in SharePoint Server 2019. To fix these issues completely, you have to install KB 4484472 together with this update:

• The view name does not change when you use Group By.
• Adding a document link does not return you to the library.
• A multichoice person column is not displayed correctly in modern view.
• The Aria-labelledby attribute value is invalid.
• The home page title is not descriptive enough.
• A banner landmark must not be contained inside another landmark.
• The title of Frame is missing in Create Site.
• If a user navigates to a custom list and opens the Links list in JAWS by using the Alt+F7 keyboard shortcut to see all links on the page, each item in the custom list shows the Open Menu link to open the Edit Control Block (ECB) menu. In this situation, it is not possible to determine which item each link belongs to.