Exchange Server supportability matrix
The Microsoft Exchange Server Supportability Matrix provides a central source of information for Exchange admins to understand the supported configurations and versions of Exchange Server.
Supported versions and builds
The following table lists the supported versions and builds of Exchange Server.
| Version | Build(s) |
|---|---|
| Exchange Server 2019 | CU15 (2025H1) CU14 (2024H1) |
| Exchange Server 2016 | CU23 |
Warning
Exchange Server 2013 has reached end of support on April 11, 2023.
Supported operating systems
The following table lists the supported operating systems for Exchange Server and the Exchange Management Tools role.
Caution
In-place upgrade of the server OS between major versions (for example, Windows Server 2019 to Windows Server 2022) with Exchange Server installed is not supported.
| Version | Operating Systems | Server Edition | Installation Options |
|---|---|---|---|
| Exchange Server 2019 | Windows Server 2025 Windows Server 2022 Windows Server 2019 |
Datacenter Standard |
Desktop Experience Server Core (recommended) |
| Exchange Server 2016 | Windows Server 2016 Windows Server 2012 R2 Windows Server 2012 |
Datacenter Standard |
Desktop Experience |
| Exchange Server 2019 Management Tools | Windows Server 2025 Windows Server 2022 Windows Server 2019 Windows 11 Windows 10 (64-bit edition) |
Datacenter Standard |
Desktop Experience |
| Exchange Server 2016 Management Tools | Windows Server 2016 Windows Server 2012 R2 Windows Server 2012 Windows 10 (64-bit edition) |
Datacenter Standard |
Desktop Experience |
Warning
Windows Server 2012 and Windows Server 2012 R2 extended support has ended on October 10, 2023. These servers will no longer receive Windows Security Updates without an ESU. We strongly recommend migrating to a supported version as soon as possible!
Supported Active Directory environments
The following table lists the supported Active Directory environments for Exchange Server.
| Version | Active Directory servers | Forest Functional Levels |
|---|---|---|
| Exchange Server 2019 | Windows Server 2025 Windows Server 2022 Windows Server 2019 Windows Server 2016 Windows Server 2012 R2 |
Windows Server 2016 Windows Server 2012 R2 |
| Exchange Server 2016 | Windows Server 2022 Windows Server 2019 Windows Server 2016 Windows Server 2012 R2 Windows Server 2012 |
Windows Server 2016 Windows Server 2012 R2 Windows Server 2012 |
Note
Support for Windows Server 2025 Active Directory servers was introduced with Exchange Server 2019 CU14 (2024H1).
Support for Windows Server 2022 Active Directory servers was introduced with Exchange Server 2019 CU12 (2022H1) and Exchange Server 2016 CU23 (2022H1).
An Active Directory server refers to both writable Global Catalog (GC) servers and writable Domain Controllers (DC). Read-only GCs and read-only DCs aren't supported.
Supported Browsers for Outlook on the web
The following table lists the supported web browsers for use with Outlook on the web (OWA) and Exchange Admin Center (EAC) in Exchange Server.
| Version | Browsers | S/MIME Support |
|---|---|---|
| Exchange Server 2019 OWA / EAC | Microsoft Chromium Edge Microsoft Chromium Edge (IE Mode) Microsoft Edge Current release of Firefox Current release of Chrome Current release of Safari |
Yes Yes Yes No Yes No |
| Exchange Server 2019 OWA Light | Microsoft Edge Current release of Safari |
S/MIME is not available in light mode |
| Exchange Server 2016 OWA / EAC | Microsoft Chromium Edge Microsoft Chromium Edge (IE Mode) Microsoft Edge Current release of Firefox Current release of Chrome Current release of Safari |
No Yes No No No No |
| Exchange Server 2016 OWA Light | Microsoft Edge Current release of Firefox Current release of Chrome Current release of Safari |
S/MIME is not available in light mode |
Note
Current release of Firefox/Chrome refers to the latest version or the immediately previous version.
Supported Email Clients
The following table lists the supported Microsoft email clients for Exchange Server.
| Version | Clients |
|---|---|
| Exchange Server 2019 | Microsoft 365 Apps for enterprise Outlook 2024 Outlook 2021 Outlook 2019 Outlook 2016 Outlook for Mac (Microsoft 365, 2019) Outlook for iOS Outlook for Android |
| Exchange Server 2016 | Microsoft 365 Apps for enterprise Outlook 2024 Outlook 2021 Outlook 2019 Outlook 2016 Outlook for Mac (Microsoft 365, 2019) Outlook for iOS Outlook for Android |
Additional Requirements and Information
Exchange Server also has supportability requirements for some of its prerequisites, namely .NET Framework and Windows PowerShell.
.NET Framework
Releases of .NET Framework that aren't listed in the table below aren't supported on any supported release of Exchange Server. These releases include minor and patch-level releases of .NET Framework.
| Version | Windows | .NET Framework |
|---|---|---|
| Exchange Server 2019 CU15 (2025H1) Exchange Server 2019 CU14 (2024H1) |
Windows Server 2025 Windows Server 2022 |
.NET Framework 4.8.1 (recommended) or .NET Framework 4.8 |
| Exchange Server 2019 CU15 (2025H1) Exchange Server 2019 CU14 (2024H1) |
Windows Server 2019 | .NET Framework 4.8 |
| Exchange Server 2016 CU23 | Any supported OS | .NET Framework 4.8 |
Windows PowerShell
Exchange Server 2019 and Exchange Server 2016 support only the version of PowerShell included in Windows Server. Exchange Server doesn't support the use of Windows Management Framework (WMF) add-ons on any version of Windows PowerShell or Windows. If there are other installed versions of Windows PowerShell or PowerShell Core that support side-by-side operation, Exchange Server will use only the version that it requires.
For additional information, see the following resources:
- Exchange Server 2019 system requirements and prerequisites
- Exchange Server 2016 system requirements and prerequisites
- Exchange Server 2013 system requirements and prerequisites
- Exchange Server build numbers and release dates