On-demand hotfix update package for SQL Server 2017 CU15

Applies to: SQL Server 2017 Developer on WindowsSQL Server 2017 Enterprise Core on WindowsSQL Server 2017 Enterprise on Windows


This article describes an on-demand hotfix update package for Microsoft SQL Server 2017 Cumulative Update 15 (CU15). This update contains hotfixes for issues that were fixed after the release of SQL Server 2017 CU15. To apply this hotfix package, you must have SQL Server 2017 installed on your computer.

Note The build number of the hotfix update package is 14.0.3164.1.


Microsoft Knowledge Base articles that discuss these hotfixes will be released as they become available.

For more information about these Microsoft SQL Server issues, see the following article in the Microsoft Knowledge Base.

VSTS bug number

KB article number




FIX: "sys.fn_hadr_backup_is_preferred_replica(database)" query fails for WSFC type in SQL Server 2017


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. 


Hotfix information

Hotfix for SQL Server 2017 CU15

An on-demand hotfix update is available. We recommend that customers who are affected by the issues that are described in this article apply this update.

Download the on-demand hotfix for SQL 2017 CU15 now.

Hotfix update package information

Restart information

You may have to restart the computer after you apply this hotfix update.

Registry information

To use one of the hotfixes in this package, you don't have to make any changes to the registry.