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

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


If you are running Microsoft Windows Server 2008 R2 SP1, read the SHA-2 required compatibility and ensure your operating system has all necessary patches applied.

Supported Microsoft Exchange Server versions:

Microsoft Exchange Server 2019 up to CU9

Microsoft Exchange Server 2016 up to CU20

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

Microsoft Exchange Server 2010 SP1, SP2, SP3 up to RU30

Microsoft Exchange Server 2007 SP1, SP2, SP3


SP1 aka CU4 on Microsoft Exchange Server 2013 is not supported by ESET Mail Security.

Minimum hardware requirements:




Intel or AMD single core x86 or 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.