This non-security update includes improvements and fixes that were a part of KB4088876 (released March 13, 2018) and also includes these new quality improvements as a preview of the next Monthly Rollup update:
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Addresses an issue in which an iSCSI RESET might trigger a cluster failover.
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Addresses an issue in which using Offline Data Transfer between two servers might add extra bytes to the destination file.
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Addresses an issue in which WMI stops responding to queries and WMI-dependent operations fail after exceeding the 256 MB WMI Arbitrator memory limit. Computers that experience high WMI memory usage or that return error WBEM_E_INVALID_CLASS or WBEM_E_NOT_FOUND should have this update applied. For more information, see KB4096063.
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Addresses an issue in which server logons become unresponsive because of an unreleased SRW lock.
- Addresses an issue in which customers sometimes can't sign in to Windows 2012 R2 servers when using a custom credential provider on a console or RDP.
- Addresses an issue that decreases the Universal CRT’s performance in the _gcvt and _gcvt_s functions.
- Addresses an issue in which the output to a file or pipe was fully buffered in the Universal CRT for the standard error (STDERR) stream.
- Addresses an issue in the Universal CRT by adding the "x" access mode flag to support the fopen() function.
- Addresses an issue in which a race condition in the Universal C Runtime (CRT) occurs when you update the global locale. The issue corrupts the current locale reference count and triggers a double free condition.
For more information about the resolved security vulnerabilities, see the Security Update Guide.