List of currently available hotfixes for Distributed File System (DFS) technologies in Windows Server 2012 and Windows Server 2012 R2

Applies to: Windows Server 2012 R2 DatacenterWindows Server 2012 R2 StandardWindows Server 2012 Datacenter

Summary


This article lists the hotfixes that are currently available for users who have installed Distributed File System (DFS) technologies on a Windows Server 2012-based computer or a Windows Server 2012 R2-based computer.

Introduction


This Microsoft Knowledge Base articles that are listed in this article describe the available fixes. If you have installed DFS technologies on a Windows Server 2012-based computer or a Windows Server 2012 R2-based computer, we recommend that you review and install the hotfixes that are described in More Information.

A servicing approach of installing the monthly rollups provides customers with a consistent model for staying current and secure. You may substitute a more recent monthly rollup for an older monthly rollup. The remainder of the updates in this list are still required because some components in those updates were released prior to October 2016 and are not included in a more recent monthly rollup. For more information about this servicing approach, see https://aka.ms/rollupblog.

Windows Server 2012 R2

You can get the latest fixes for these DFS components by installing the following updates:

Windows Server 2012

You can get the latest fixes for these DFS components by installing the following updates:

More information


DFS namespaces

Windows Server 2012 R2

Date added
Knowledge Base article
Title
Why we recommend this hotfix
Hotfix type and availability
April 15, 2020 4056895 January 8, 2018—KB4056895 (Monthly Rollup) This monthly rollup contains the 6.3.9600.18895 version of Dfsc.sys. (client-side). Included in January 3, 2018—KB4056898 (Security-only update).

Included in January 8, 2018—KB4056895 (Monthly Rollup) and later monthly rollups.
Mar 06, 2015 3046481 DFS Namespaces deployment causes slow access or access time-out when you access DFS share in Windows Server 2012 R2. This hotfix contains the most current version of Dfssvc.exe for Windows Server 2012 R2. To install this update, you must have Windows Server 2012 R2 installed.

 

Windows Server 2012

Date added
Knowledge Base article
Title
Why we recommend this hotfix
Hotfix type and availability
April 15, 2020 3192406 October 2016 Preview of Monthly Quality Rollup for Windows Server 2012 This monthly rollup contains the 6.2.9200.21968 version of Dfssvc.exe and the 6.2.9200.21976 version of Dfsc.sys for Windows Server 2012. Included in October 2016 Preview of Monthly Quality Rollup for Windows Server 2012 and later monthly rollups.

 

DFS replication

Windows Server 2012 R2

Date added
Knowledge Base article
Title
Why we recommend this hotfix
Hotfix type and availability
April 15, 2020 4038774 September 19, 2017—KB4038774 (Preview of Monthly Rollup) This monthly rollup contains the 6.3.9600.18776 version of Dfsrs.exe for Windows Server 2012 R2. Included in September 19, 2017—KB4038774 (Preview of Monthly Rollup) and later monthly rollups.
  Not applicable   This hotfix contains the most current version of Dfsrro.sys for Windows Server 2012 R2. To install this hotfix, you must have Windows Server 2012 R2 installed.
  Not applicable   This hotfix contains the most current version of Dfsrclus.dll for Windows Server 2012 R2.  
August 31, 2014 2996883 DFSR stops replication after an unexpected shutdown in a Windows 8.1 or Windows Server 2012 R2 environment This hotfix contains the most current versions of Dfsrdiag.exe and Dfsrmig.exe for Windows Server 2012 R2. To apply this hotfix, you must be running Windows Server 2012 R2 and April 2014 Update 2919355.

 

Windows Server 2012

Date added
Knowledge Base article
Title
Why we recommend this hotfix
Hotfix type and availability
February 14, 2015 2884176 Large backlogs on Windows-based DFSR servers This hotfix contains the most current version of Dfsrs.exe and Dfsrress.dll for Windows Server 2012. To install this hotfix, you must have Windows Server 2012 installed. This hotfix is available for individual download.
Jan-10 2016 3121255 "0x00000024" Stop error in FsRtlNotifyFilterReportChange and VSS backup of PI Data server fails in Windows This hotfix contains an update for Ntfs.sys for Windows Server 2012. To install this hotfix, you must have Windows Server 2012 installed. This hotfix is available for individual download. This hotfix is also included in July 11, 2017—KB4025331 (Monthly Rollup) and later monthly rollups.

 

DFS replication - Sysvol migration

Date added
Knowledge Base article
Title
Why we recommend this hotfix
Hotfix type and availability
  Not applicable   This hotfix contains the most current versions of Dfsrdiag.exe and Dfsrmig.exe for Windows Server 2012. To install this hotfix, you must have Windows Server 2012 installed.

 

Robocopy

Windows Server 2012 R2

Date added
Knowledge Base article
Title
Why we recommend this hotfix
Hotfix type and availability
18-Nov-2014 3000850 November 2014 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 This hotfix contains the most current version of Robocopy.exe.

Robocopy can be used to pre-seed datafor new replicated folders and is also used during the migration of Sysvol from FRS to DFSR.
To install this update rollup, you must have Windows Server 2012 R2 installed and April 2014 Update 2919355.

 

Windows Server 2012

Date added
Knowledge Base article
Title
Why we recommend this hotfix
Hotfix type and availability
May 16, 2014 2962407 Windows RT, Windows 8, and Windows Server 2012 update rollup: June 2014 This hotfix contains the most current version of Robocopy.exe.

Robocopy can be used to pre-seed datafor new replicated folders and is also used during the migration of Sysvol from FRS to DFSR.
To install this hotfix, you must have Windows 8 or Windows Server 2012 installed.

 

DFS-related registry subkeys that were introduced in hotfixes or security updates

Date
Knowledge Base article
Registry subkey
 
 
January 21, 2012 2663685 HKLM\System\CurrentControlSet\Services\DFSR\Parameters\StopReplicationOnAutoRecovery/strong>    
November 18. 2009 967326 HKLM\System\CurrentControlSet\Services\DFSR\Parameters\Settings\RpcContextHandleTimeoutMs