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Microsoft Exchange Server Changelog

What's new in Microsoft Exchange Server 15.02.1544.011 Apr24HU

Apr 24, 2024
  • Features introduced in this update:
  • Elliptic Curve Cryptography certificates support in Exchange Server 2016 and 2019
  • Hybrid Modern Authentication support for OWA and ECP in Exchange Server 2019 CU14
  • Issues that are fixed in this update:
  • "We can't open this document" error in OWA after installing March 2024 SU
  • Search error in Outlook cached mode after installing March 2024 SU
  • OwaDeepTestProbe and EacBackEndLogonProbe fail after installing March 2024 SU
  • Edit permissions option in the ECP can't be edited
  • Outlook doesn't display unread message icon after installing Exchange Server March 2024 SU
  • My Templates add-in doesn't work after installing Exchange Server March 2024 SU
  • Download domains not working after installing the March 2024 SU

New in Microsoft Exchange Server 15.02.1258.027 Oct23SU (Oct 10, 2023)

  • Setup:
  • Custom configuration preservation: Exchange setup now backs up and restores the most common configuration files so that admins no longer need to manually restore them or reapply themFor additional information, see Exchange Server custom configuration preservation
  • Security:
  • Windows Server Core support: Running Exchange on a Windows deployment with less surface area means less attack surface area and fewer components to service.
  • Block external access to Exchange admin center (EAC) and the Exchange Management Shell: You can use Client Access Rules to only allow administration of Exchange from the internal network instead of using complex network and firewall rules.
  • TLS 1.2 is the only version that's enabled by default: Exchange Server 2019 includes important changes to improve the security of client and server connectionsThe default configuration for encryption will enable TLS 1.2 only and disable support for older algorithms (namely, DES, 3DES, RC2, RC4 and MD5)It will also configure elliptic curve key exchange algorithms with priority over non-elliptic curve algorithmsIn Exchange Server 2016 and later, all cryptography settings are inherited from the configuration specified in the operating systemFor additional information, see Exchange Server TLS Guidance.
  • Modern authentication support for pure on-premises environments: Exchange Server 2019 supports OAuth 2.0 (aka Modern authentication) for pure on-premises environments using ADFS as a security token service (STS)For additional information and requirements, see Enabling Modern Auth in Exchange On-Premises.
  • Performance:
  • Improved search infrastructure: The completely rebuilt search infrastructure for cloud scale and reliability in Exchange Online is now available in Exchange 2019This new search infrastructure allows for indexing of bigger files, simpler management, and better search performance.
  • Faster, more reliable failovers: The changes to the search architecture result in significantly faster and more reliable failover over between servers.
  • Metacache database: Improvements at the core of Exchange's database engine enable better overall performance and take advantage of the latest storage hardware, including larger disks and SSDs.
  • Modern hardware support: Exchange now supports up to 256 GB of memory and 48 CPU cores.
  • Dynamic database cache: The information store process employs dynamic memory cache allocation optimizing memory usage to active database usage.
  • Clients:
  • Calendar - Do Not Forward: This is similar to Information Rights Management (IRM) for calendar items without the IRM deployment requirementsAttendees can't forward the invitation to other people, and only the organizer can invite additional attendees.
  • Calendar - Better Out of Office: Additional options when you won't be in the officeKey options include: add an event to your calendar that shows you as Away/Out of Office, and a quick option to cancel/decline meetings that will happen while you're away.
  • Calendar - Remove-CalendarEvents cmdlet: Enables administrators to cancel meetings that were organized by a user that has left the companyPreviously, conference rooms or meeting attendees would have these defunct meetings permanently on their calendars.
  • Email address internationalization (EAI): Email addresses that contain non-English characters can now be routed and delivered natively.

New in Microsoft Exchange Server 15.02.1118.026 Mar23SU (Mar 15, 2023)

  • Issues that are fixed in this update:
  • You can’t access Toolbox on Exchange after enabling EnableSerializationDataSigning
  • EEMS stops responding after TLS endpoint certificate update
  • Get-App and GetAppManifests fail and return an exception
  • EWS does not respond and returns an exception
  • An exception is returned while opening a template in the Exchange Toolbox

New in Microsoft Exchange Server 2019 15.02.0858.012 May21SU (May 28, 2021)

  • This security update rollup resolves vulnerabilities in Microsoft Exchange Server. To learn more about these vulnerabilities, see the following Common Vulnerabilities and Exposures (CVE):
  • CVE-2021-31195 | Microsoft Exchange Server Remote Code Execution Vulnerability
  • CVE-2021-31198 | Microsoft Exchange Server Remote Code Execution Vulnerability
  • CVE-2021-31207 | Microsoft Exchange Server Security Feature Bypass Vulnerability
  • CVE-2021-31209 | Microsoft Exchange Server Spoofing Vulnerability
  • Improvements in this update:
  • The Exchange Server version number is now added to the HTTP response reply header. You can use this information to validate the security update status of Exchange-based servers in your network.

New in Microsoft Exchange Server 2019 15.02.0858.005 (Mar 17, 2021)

  • Certain search scenario can't return expected result in Outlook online mode in Exchange Server 2019
  • Can't use keyword "TMM" in a special pattern to search email in Exchange Server 2019
  • Attachment is treated as bad zip file on Edge Transport server in Exchange Server 2019 and 2016
  • EAC has no option to select the correct tenant for an Office 365 mailbox in Exchange Server 2019 and 2016
  • EAC has no option to select an archive domain for cloud-based archive in Exchange Server 2019 and 2016
  • Encoding of special characters isn't preserved which causes missing text in Outlook in Exchange Server 2019 and 2016
  • Incorrect MRM properties stamped on mail item delivery when sending to multiple mailboxes on the same database in Exchange Server 2019 and 2016
  • Mailbox Audit log searches and Outlook both tied to MaxHitsForFullTextIndexSearches in Exchange Server 2019 and 2016
  • MonitoringGroup can't control the placement of CAS monitoring mailboxes in Exchange Server 2019 and 2016
  • Microsoft Teams fails to show calendar because Autodiscover v2 isn't site-aware in Exchange Server 2019 and 2016
  • New health mailboxes for databases are created every time Exchange Health Manager service is restarted
  • RFC certificate timestamp validation in Exchange Server 2019 and 2016
  • UPN specified when creating mailbox is overwritten automatically causing login failures in Exchange Server 2019 and 2016
  • Event IDs 1003, 1309 and 4999 are logged after installing Exchange Server 2019 CU8
  • PDF preview function in OWA leads to download action unexpectedly

New in Microsoft Exchange Server 2016 15.01.0225.042 (Oct 6, 2015)

  • What's new when upgrading from Exchange 2013:
  • Exchange 2016 architecture
  • Office 365 hybrid
  • Clients:
  • Outlook on the web (formerly Outlook Web App)
  • MAPI over HTTP
  • Document collaboration
  • Messaging policy and compliance:
  • Data loss prevention
  • In-place Archiving, retention, and eDiscovery
  • What's new when upgrading from Exchange 2010:
  • Exchange admin center
  • Exchange 2016 architecture
  • Setup
  • Office 365 hybrid
  • Messaging policy and compliance
  • Anti-malware protection
  • Mail flow
  • Recipients
  • Sharing and collaboration
  • Integration with SharePoint and Skype for Business
  • Clients and mobile
  • Batch mailbox moves
  • High Availability and Site Resilience
  • Exchange workload management
  • Discontinued features from Exchange 2013 to Exchange 2016:
  • Client Access server role - The Client Access server role has been replaced by Client Access services that run on the Mailbox server role. The Mailbox server role now performs all functionality that was previously included with the Client Access server role.
  • MAPI/CDO library - The MAPI/CDO library has been replaced by Exchange Web Services (EWS), Exchange ActiveSync (EAS), and Representational State Transfer (REST)* APIs. If an application uses the MAPI/CDO library, it needs to move to EWS, EAS, or the REST APIs to communicate with Exchange 2016.
  • De-emphasized features in Exchange 2016:
  • Third-party replication APIs
  • RPC over HTTP
  • Database Availability Group support for failover cluster administrative access points
  • Discontinued features from Exchange 2010 to Exchange 2016:
  • Architecture:
  • Hub Transport server role
  • Unified Messaging server role
  • MAPI/CDO library
  • Management interfaces:
  • Exchange Management Console and Exchange Control Panel
  • Client access:
  • Outlook 2003 is not supported
  • RPC/TCP access for Outlook clients
  • Outlook Web App and Outlook:
  • Spell check
  • Customizable filters
  • Message flags
  • Chat contact list
  • Search folders
  • Mail flow:
  • Linked connectors
  • Anti-spam and anti-malware:
  • Anti-spam agent management in the EMC
  • Connection Filtering agent on Hub Transport servers
  • Messaging policy and compliance:
  • Managed Folders
  • Port Managed Folder wizard
  • Unified Messaging and voice mail:
  • Directory lookups using Automatic Speech Recognition (ASR)