System requirements

Supported Operating Systems:

Microsoft Windows Server 2019 (Server Core and Desktop Experience)

Microsoft Windows Server 2016

Microsoft Windows Server 2012 R2

Microsoft Windows Server 2012

Microsoft Windows Server 2008 R2 SP1 with KB4474419 exlink and KB4490628 exlink installed (read the SHA-2 required compatibility)

Microsoft Windows Small Business Server 2011 SP1 (x64) with KB4474419 exlink and KB4490628 exlink installed


On Windows Server 2008 R2 SP1, Network protection component is disabled by default in Typical installation. Use Custom installation to have this component installed.


Support for the Azure Code Signing needs to be installed on all Windows operating systems in order to install or upgrade ESET products released after the end of July, 2023. More information exlink.

If you run Windows Server 2008 R2 SP1, ensure you have KB5006728 installed to support Azure Code Signing. The ESU (Extended Security Updates) is required to install KB5006728.

Supported Microsoft Exchange Server versions:

Microsoft Exchange Server 2019 up to CU13

Microsoft Exchange Server 2016 up to CU23

Microsoft Exchange Server 2013 up to CU23 (CU1 and CU4 are not supported)

Microsoft Exchange Server 2010 SP1, SP2, SP3 up to RU32

Microsoft Exchange Server 2007 SP1, SP2, SP3


Standalone Client Access Server (CAS) role is not supported, see Exchange server roles for more details.

We recommend that you refer to ESET Mail Security features and Exchange Server Roles to identify what features are available for each supported version of Microsoft Exchange Server and their roles.

Minimum hardware requirements:




Intel or AMD single core x64


256 MB of free memory

Hard drive

700 MB of free disk space

Screen resolution

800 x 600 pixels or higher

ESET Mail Security has the same recommended hardware requirements that apply to Microsoft Exchange Server. See the following Microsoft Technical Articles for details:

Microsoft Exchange Server 2007 exlink

Microsoft Exchange Server 2010 exlink

Microsoft Exchange Server 2013 exlink

Microsoft Exchange Server 2016 exlink


We strongly recommend that you install the latest Service Pack for your Microsoft Server operating system and server application before installing ESET security product. We also recommend that you install the latest Windows updates and hotfixes whenever available.