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

Exchange Server 2016 CU20 Build 15.01.2242.004 - Release date: March 16, 2021

Issues that this cumulative update fixes
This cumulative update also fixes the issues that are described in the following Microsoft Knowledge Base articles:
- 5001183 Attachment is treated as bad zip file on Edge Transport server in Exchange Server 2019 and 2016
- 5001184 EAC has no option to select the correct tenant for an Office 365 mailbox in Exchange Server 2019 and 2016
- 5001185 EAC has no option to select an archive domain for cloud-based archive in Exchange Server 2019 and 2016
- 5001186 Encoding of special characters isn't preserved which causes missing text in Outlook in Exchange Server 2019 and 2016
- 5001188 Incorrect MRM properties stamped on mail item delivery when sending to multiple mailboxes on the same database in Exchange Server 2019 and 2016
- 5001189 Mailbox Audit log searches and Outlook both tied to MaxHitsForFullTextIndexSearches in Exchange Server 2019 and 2016
- 5001190 MonitoringGroup can't control the placement of CAS monitoring mailboxes in Exchange Server 2019 and 2016
- 5001192 Microsoft Teams fails to show calendar due to Autodiscover v2 isn't site aware in Exchange Server 2019 and 2016
- 5001193 New health mailboxes for databases are created every time Exchange Health Manager service is restarted
- 5001194 RFC certificate timestamp validation in Exchange Server 2019 and 2016
- 5001195 UPN specified when creating mailbox is overwritten automatically causing login failures in Exchange Server 2019 and 2016
- 4583558 PDF preview function in OWA leads to download action unexpectedly

Exchange Server 2016includes 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.

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.

Microsoft Corporation,leading developer of personal-computer software systems and applications. The company also publishes books and multimedia titles, offers e-mail services, and sells electronic game systems, computer peripherals (input/output devices), and portable media players. It has sales offices throughout the world.

Product:Microsoft Exchange Server
Version:2016 CU20 Build 15.01.2242.004
Supported Architectures:x64
Website Home Page :www.microsoft.com
Language:multilanguage
System Requirements:PC *
Size:1.8 Gb

The following is a list of recommended and required items for installing Exchange Server 2016.

Exchange 2016 Server Requirements

- Coexistence: Requires Exchange 2010 SP3 UR11 or Exchange 2013 UR10
- OS: Windows Server 2012 R2 Standard or Datacenter (full GUI required, Core not supported).
- CPU: Minimum of 2 CPUs with 2 cores each; Intel and AMD are supported.
- Memory: For Mailbox role, 8GB memory minimum; Recommend 16GB or higher.
- Page file: Amount of RAM + 10MB, not to exceed 32778MB (32GB) for initial and maximum size.
- System (OS) partition: Must be NTFS. Recommend 120-150GB.
- Data partition(s): Can be ReFS. Total size of all legacy EDBs + optional 30-40% minimum for growth.
- Domain Controllers (DC): Must be Windows Server 2008 or newer.
- Active Directory Forest Functional Level (FFL): Must be Windows Server 2008 or newer.
- IPv6: Do not disable.
- .NET Framework: Only .NET Framework 4.5.2 is supported currently.
- Outlook Clients: Outlook 2010 with KB2965295 or newer (for Windows); Outlook 2011 for Mac or newer (for Mac).