Microsoft Exchange Server 2016 CU22

The Microsoft development team is pleased to announce the availability of Cumulative Update 22 to Exchange Server 2016. This update include fixes for customer reported issues, all previously released security updates, and a new security feature.

Cumulative Update 22 for Exchange Server 2016 (KB5005333)

This September 2021 cumulative update (CU) install Exchange Emergency Mitigation (EM) service. This service is designed to help secure your servers that are running Microsoft Exchange Server by applying mitigations to address any potential threats against them. It uses the cloud-based Office Config Service (OCS) to check for and download available mitigations and to send diagnostic data to Microsoft.

This CU has following additional prerequisites:
- IIS URL Rewrite Module
- Universal C Runtime in Windows (KB 2999226)

Cumulative Update 22 for Microsoft Exchange Server 2016 was released on September 28, 2021. It includes fixes for nonsecurity issues and all previously released fixes for security and nonsecurity issues. These fixes will also be included in later cumulative updates for Exchange Server 2016.

This update also includes new daylight saving time (DST) updates for Exchange Server 2016.

New feature in this cumulative update
Microsoft Exchange Server 2016 now supports integration with Windows Antimalware Scan Interface (AMSI). This feature enables an AMSI-capable antivirus or antimalware solution to scan content in HTTP requests that're sent to the Exchange Server. Additionally, it will block a malicious request before it's handled by Exchange.

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

5006980 Bad signature error using PerfView in Exchange Server 2019 and 2016 (KB5006980)
5006982 On-premises Exchange queues back up because of incorrect default value (KB5006982)
5006983 Exchange Server 2019 and 2016 certificates created during setup use SHA-1 hash (KB5006983)
5006984 PrepareAD fails if Computers container or RODCs are renamed or moved in Exchange Server 2019 and 2016 (KB5006984)
5006986 Opening an Outlook message from the desktop removes line spacing (KB5006986)
5006988 Export of .pst file is unexpectedly triggered again in Exchange Server 2019 and 2016 (KB5006988)
5006989 Accepted domains with wildcards for subdomains are not honored when Edge server maps AddressSpaces (KB5006989)
5006992 No room lists found when trying to add a room in OWA in Exchange Server 2019 or 2016 (KB5006992)
5006993 Can't log on to OWA in Chrome if SSL is offloaded in Exchange Server 2019 and 2016 (KB5006993)
5006994 BCC values not retained in Sent Items in a shared mailbox in Exchange Server 2019 and 2016 (5006994)
5006995 Korean email messages display some recipients incorrectly in Exchange Server 2019 and 2016 (KB5006995)
5006996 Export-AutoDiscoverConfig exposes admin password and does not work against domain controllers that require signing (KB5006997)
5006997 Korean messages in OWA display "From" as "Start date" after you filter the list in Exchange Server 2019 and 2016
5007042 Error window appears when you view features in OWA Virtual Directory (KB5007042)
5007043 Exchange Server SU updates Add/Remove Programs incorrectly (KB5007043)

Exchange Server 2016 includes a number of advanced features for organizations to have a resilient deployment of email across multiple customer sites. It is closely integrated into other products such as Office, SharePoint, Skype for Business (formerly Microsoft Lync) and Office 365, and it shares a similar interface to Exchange Server 2013.

Many of the features in Exchange 2016 were first deployed in the cloud with Office 365 before coming to the on-premises version of Exchange. However, some features such as Clutter won't be included because they require Office Graph to work.

Exchange 2016 includes improved features and capabilities from previous versions of Exchange. These include a faster database availability group (DAG) failover time, which dropped from about 30 seconds to about 18 seconds, and a 22% lower input/output operations per second (IOPS) from Exchange 2013.

Exchange 2016 combines the mailbox and Client Access Server (CAS) roles, which should allow for simpler designs and architecture. It also includes support for BitLocker to provide additional protection for data at rest as well as enhancements to support hybrid Exchange setups.

Cumulative Update 21 for Microsoft Exchange Server 2016 was released on June 29, 2021. This cumulative update includes fixes for nonsecurity issues and all previously released fixes for security and nonsecurity issues. These fixes will also be included in later cumulative updates for Exchange Server 2016.

This update also includes new daylight saving time (DST) updates for Exchange Server 2016.

Exchange team veteran Greg Taylor explains how the on-premises version of Exchange 2016 benefits from the proven cloud-based features and functionality of Exchange Online.


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Product: Microsoft Exchange Server
Version: 2016 CU22 Build 15.01.2375.007
Supported Architectures: x64
Website Home Page : www.microsoft.com
Languages Supported: multilanguage
System Requirements: PC *
Size: 1.8 Gb