Cumulative Update 1 for Exchange Server 2016

Cumulative Update 1 for Microsoft Exchange Server 2016 was released on March 15, 2016. Several nonsecurity issues are fixed in this cumulative update or a later cumulative update for Exchange Server 2016.
Get Cumulative Update 1 for Exchange Server 2016
Download Cumulative Update 1 for Exchange Server 2016 (KB3134844) now.

Note The Cumulative Update 1 package can be used to run a new installation of Exchange Server 2016.
Issues that the cumulative update fixes

This cumulative update fixes an issue in which Test-ExchangeSearch or Test-ExchangeSearch -MailboxDatabase doesn't work.

This cumulative update also fixes the issues that are described in the following Microsoft Knowledge Base articles:

Known issues

After you install this update on a computer where the CPU is older than the Nehalem (Intel, 2008) or Barcelona (AMD, 2007) microarchitectures, Exchange Server 2016 search processes will crash. However, this issue will be resolved in Cumulative Update 2 for Exchange Server 2016.

Note: To validate if your computer is affected, run the coreinfo.exe /ACCEPTEULA /F | findstr POPCNT command by using the Coreinfo utility to test.
  • For a CPU that is incompatible with Cumulative Update 1, you will receive the following POPCNT output:
    Coreinfo v3.31 - Dump information on system CPU and memory topology
    Copyright (C) 2008-2014 Mark Russinovich
    Sysinternals - www.sysinternals.com
    POPCNT - Supports POPCNT instruction
  • For a CPU that is compatible with Cumulative Update 1, the POPCNT output will be displayed as:
    Coreinfo v3.31 - Dump information on system CPU and memory topology
    Copyright (C) 2008-2014 Mark Russinovich
    Sysinternals - www.sysinternals.com
    POPCNT * Supports POPCNT instruction
Cumulative update information

Prerequisites

For more information about the prerequisites before the setup of Exchange Server 2016, see Exchange 2016 prerequisites.

Restart requirement

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

Registry information

You don't have to make any changes to the registry after you apply this cumulative update package.

Removal information

After you install this cumulative update package, you can't uninstall the package to revert to an earlier version of Exchange Server 2016. If you uninstall this cumulative update package, Exchange Server 2016 is removed from the server.
More information
For more information about the deployment of Exchange Server 2016, see Release Notes for Exchange 2016.

For more information about the coexistence of Exchange Server 2016 and earlier versions of Exchange Server in the same environment, see Exchange 2016 System Requirements.

For more information about other Exchange updates, see Exchange Server Updates: Build numbers and release dates.
References
See the terminology that Microsoft uses to describe software updates.
Note This is a "FAST PUBLISH" article created directly from within the Microsoft support organization. The information contained herein is provided as-is in response to emerging issues. As a result of the speed in making it available, the materials may include typographical errors and may be revised at any time without notice. See Terms of Use for other considerations.
Properties

Article ID: 3134844 - Last Review: 06/12/2016 06:29:00 - Revision: 4.0

Exchange Server 2016 Enterprise Edition, Exchange Server 2016 Standard Edition

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