Update rollup for Azure File Sync Agent: December 2018


This article describes the improvements and issues that are fixed in the update for the Azure File Sync Agent that's dated December 2018. Additionally, this article contains installation instructions for this release.

Improvements and issues that are fixed

  • A Stop error 0x3B or Stop error 0x1E may occur when a VSS snapshot is created.

  • The server may become unresponsive because of a cloud-tiering memory leak.

  • Agent installation fails with the following error:

    Error 1921. Service 'Storage Sync Agent' (FileSyncSvc) could not be stopped.  Verify that you have sufficient privileges to stop system services.

  • The Storage Sync Agent (FileSyncSvc) service may crash when memory usage is high.

  • Miscellaneous reliability improvements for cloud tiering and sync.

Note Update rollups for Azure File Sync Agent are cumulative. This update includes all the improvements and fixes that were included in the previous cumulative update.

More information about this update rollup

  • This update is available for Windows Server 2012 R2, Windows Server 2016, and Windows Server 2019 installations that have Azure File Sync agent version or a later version installed.

  • The agent version of this update rollup is

  • A restart may be required if certain files are being used during the update rollup installation.


Learn about the standard terminology that Microsoft uses to describe software updates.

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