Cumulative Update 1 for Exchange Server 2016

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:

• KB 3139730 Edge Transport service crashes when you view the properties of a poison message in Exchange Server 2016
• KB 3135689 A custom SAP ODI URI is removed by ActiveSync from an email message in an Exchange Server environment
• KB 3135688 Preserves the web.config file for Outlook Web App when you apply a cumulative update in Exchange Server 2016
• KB 3135601 Cyrillic characters are displayed as question marks when you run the "Export-PublicFolderStatistics.ps1" script in an Exchange Server 2016 environment
• KB 3124242 Mailbox quota is not validated during migration to Exchange Server 2013 or Exchange Server 2016

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