This article describes an issue that occurs on a Windows Server 2012 R2-based Work Folders sync server. You can fix this issue by using the update in this article. Before you install this update, see the Prerequisites section.
High network usage may occur when the File Server Resource Manager (FSRM) file screening is implemented on the Work Folders sync server to block certain file types. For example, audio or video files, image files, executables, system files, and Outlook data files.
This issue occurs because the FSRM file screening blocks the file(s) when they are transferred to the Work Folders sync server. The Work Folders service then tries to re-sync the file(s), which causes increased network usage.
How to get this update
Important If you install a language pack after you install this update, you must reinstall this update. Therefore, we recommend that you install any language packs that you need before you install this update. For more information, see Add language packs to Windows.
Note This update has to be installed on the Work Folders sync server where FSRM is running.
To apply this update, you don't have to make any changes to the registry.
You may have to restart the computer after you apply this update.
Update replacement information
This update doesn't replace a previously released update.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Learn about the terminology that Microsoft uses to describe software updates.
The English (United States) version of this software update installs files that have the attributes that are listed in the following tables.
Windows Server 2012 R2
The files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:
6.3.960 0.18 xxx
Windows Server 2012 R2
GDR service branches contain only those fixes that are widely released to address widespread, critical issues. LDR service branches contain hotfixes in addition to widely released fixes.
The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed in the "Additional file information" section. MUM, MANIFEST, and the associated security catalog (.cat) files, are very important to maintain the state of the updated components. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.