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.
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)
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:
If you’re an administrator who deploys and manages Microsoft 365 and performs Microsoft 365 tenant-level implementation and administration of cloud and hybrid environments, this certification is designed for you.