Feature availability for Exchange Server

The following table lists the major Exchange Server features available across different supported versions (certain caveats apply -- see the footnotes for further information -- this table may change without notice).

Feature Description Exchange Server 2013 Exchange Server 2016 Exchange Server 2019
Anti-spam and anti-malware protection Built-in anti-spam and anti-malware protection Yes Yes Yes
Customize anti-spam and anti-malware policies Yesvia PowerShell Yesvia PowerShell Yesvia PowerShell
Quarantine - administrator management Yes Yes Yes
Quarantine - end-user self-management Yes Yes Yes
Clients and mobile devices Outlook for Windows and Mac1 Yes Yes Yes
Outlook on the web1 Yes Yes Yes
Outlook for iOS and Android1 Yes Yes Yes
Outlook add-ins and Outlook MAPI3 Yes Yes Yes
Web Parts Yes Yes Yes
Exchange ActiveSync Yes Yes Yes
SMTP, POP and IMAP Yes Yes Yes
EWS application support Yes Yes Yes
Exchange Online setup and administration Exchange admin center access Yes Yes Yes
Remote Windows PowerShell access Yes Yes Yes
ActiveSync policies for mobile devices Yes Yes Yes
Usage reporting Yes Yes Yes
High availability and business continuity Database availability groups Yes Yes Yes
Deleted mailbox and deleted item recovery Yes Yes Yes
Single item recovery Yes Yes Yes
Interoperability, connectivity, and compatibility Skype for Business presence in OWA and Outlook Yes Yes Yes
SharePoint interoperability Yes Yes Yes
EWS connectivity and SMTP relay support Yes Yes Yes
Mail flow Hybrid email and custom routing of outbound mail Yes Yes Yes
Secure messaging with a trusted partner Yes Yes Yes
Conditional mail routing and adding to an inbound safe list Yes Yes Yes
Message policy and compliance Cloud-based archiving of on-premises mailboxes4 Yes Yes Yes
Messaging Records Management (MRM) and Journaling Yes Yes Yes
Manual retention policies, labels, and tags Yes Yes Yes
Encryption of data at rest (BitLocker)5 Yes Yes Yes
IRM using Azure Information Protection Yes Yes Yes
IRM using Windows Server AD RMS6 Yes Yes Yes
S/MIME Yes Yes Yes
In-Place Hold and Litigation Hold Yes Yes Yes
In-Place eDiscovery Yes Yes Yes
Transport rules8 Yes Yes Yes
Data loss prevention9,10 Yes Yes Yes
Permissions Role-based permissions, role groups and assignment policies Yes Yes Yes
Planning and deployment Hybrid deployment support IMAP, cutover, and staged migration support Yes Yes Yes
Recipients Capacity alerts, Inbox rules and Mail Tips Yes Yes Yes
Clutter No No No
Delegate access Yes Yes Yes
Connected accounts Yes Yes Yes
Inactive mailboxes No No No
Offline address book and policies Yes Yes Yes
Hierarchical address book Yes Yes Yes
Address lists and global address list Yes Yes Yes
Universal contact card, contact linking with social networks and external contacts Yes Yes Yes
Out-of-office replies, conference room management and resource mailboxes Yes Yes Yes
Calendar sharing Yes Yes Yes
Reporting features and troubleshooting tools Message trace Yes No Yes
Auditing reports Yes Yes Yes
Unified Messaging reports Yes Yes Yes
Sharing and collaboration Federated sharing (including calendar publishing) Yes Yes Yes
Site mailboxes11 Yes Yes Yes
Public folders Yes Yes Yes
Voice message services Voice mail Yes12 No No
Integration between voice mail and third-party FAX Yes12 No No
Third-party voice mail interoperability and Skype for Business integration Yes12 No No

1 The table indicates if the client works with the server. It does not mean the clients are included in the purchase of these servers.
3 Some third-party web parts and add-ins may not be available.
4 Requires an Exchange Online Archiving subscription for each on-premises mailbox user that has a cloud-based archive.
5 BitLocker drive encryption is supported for Exchange Server, but an administrator needs to enable the feature.
6 Windows Server AD RMS is an on-premises server that must be purchased and managed separately in order to enable the supported IRM features.
7 Supported for customers running Exchange Server 2013 or later on-premises customers who purchase Azure Information Protection. Microsoft Purview Message Encryption requires on-premises customers to route email through Exchange Online, either by using Exchange Online Protection for email filtering, or by establishing hybrid mail flow.
8 Transport rules are made up of flexible criteria, which allow you to define conditions and exceptions, and actions to take based on the criteria.
9 For Exchange 2013, DLP requires an Exchange Enterprise Client Access License (CAL).
10 Customers running Exchange Server 2013 or later need to download and install the latest cumulative update (CU) or the immediately previous CU, to access Document Fingerprinting and Policy Tips in OWA and OWA for Devices.
11 SharePoint Server must be deployed in the on-premises Exchange organization.
12 Cloud Voicemail works with Exchange Online and Exchange 2019. See Plan Cloud Voicemail service for on-premises users - Skype for Business Hybrid | Microsoft Docs.

For information regarding Exchange Online, go to Exchange Online Service Description.