System requirements overview

SERVER
END-USER
MIGRATION TOOLS

OPERATING SYSTEM

Windows 64-bit versions

Microsoft Windows Server 2022
Microsoft Windows Server 2019
Microsoft Windows Server 2016
Microsoft Windows Server 2012 R2
Microsoft Windows Server 2008 R2

Linux 64-bit versions

Red Hat Enterprise Linux 6, 7, 8, 9 and CentOS 6, 7, 8
Debian 7, 8, 9, 10, 11
Ubuntu 14.04 LTS, 16.04 LTS, 18.04 LTS, 19.04, 20.04, 22.04

Mac (Intel and M1/M2/M3)

macOS 14 Sonoma
macOS 13 Ventura
macOS 12 Monterey
macOS 11 Big Sur
macOS 10.16 Big Sur
macOS 10.15 Catalina
macOS 10.14 Mojave
macOS 10.13 High Sierra
macOS 10.12 Sierra
OS X 10.11 El Capitan
OS X 10.10 Yosemite
OS X 10.9 Mavericks
OS X 10.8 Mountain Lion
Emulator Rosseta 2 needs to be used with M1/ M2/M3 chipsets

HARDWARE

PC

Minimal HW configuration (1-20 users):
2 Core CPU 1 GHz 64-bit, 4 GB RAM, 40 GB of free space for message store and backup
Recommended HW configuration (20-100 users):
4 Core CPU 2 GHz 64-bit, 8 GB RAM, 160 GB of free space for message store and backup
Recommended HW configuration (100+ users):
8 Core CPU 2.8 GHz 64-bit, 16 GB RAM, 64-bit OS, 200 GB+ of free space for message store and backup

Mac (Intel/M1/M2/M3)

Minimal HW configuration (1-20 users):
Mac Core2Duo 64-bit, 4 GB RAM, 40 GB of free space for message store and backup
Recommended HW configuration (20-100 users):
Mac Core i5 64-bit, 8 GB RAM, 160 GB of free space for message store and backup
Recommended HW configuration (100+ users):
Mac Core i7 64-bit, 16 GB RAM, 200 GB+ of free space for message store and backup
Emulator Rosseta 2 needs to be used with M1/ M2/M3 chipsets

VMWare / HyperV

The same requirements as for the standard installation + the host OS overhead.

DIRECTORY SERVER EXTENSIONS

Kerio Active Directory Extension 64-bit

Microsoft Windows Server 2022
Microsoft Windows Server 2019
Microsoft Windows Server 2016
Microsoft Windows Server 2008
Microsoft Windows Server 2008 R2
Microsoft Windows Server 2008 R2 Foundation
Microsoft Windows Server 2012
Microsoft Windows Server 2012 R2 (all editions)

Install on Active Directory Server for user management, import and authentication in KerioConnect.

Kerio Open Directory Extension

macOS 10.14 Server
macOS 10.13 Server
macOS 10.12 Server
OS X 10.11 Server
OS X 10.10 Server
OS X 10.9 Server
OS X 10.8 Server

Install on Apple Open Directory Server for user import and authentication in KerioConnect.

WEB ADMINISTRATION

Web Browsers

Internet Explorer 11 and Edge
Google Chrome 31 and higher
Safari 9 and higher
Safari on Apple iPad
Firefox 23 and higher

MICROSOFT OUTLOOK

Kerio Outlook Connector

32-bit version:
- Microsoft Outlook 365 and Outlook 2021, 2019, 2016
- Using 32-bit Outlook Connector, Microsoft Outlook may run on:
  - Windows 7, 8, 10, and 11.
  - Windows Server 2008, 2008 R2, 2012, 2012 R2.
  - Terminal Server on Windows Server 2008, 2008 R2, 2008 R2 Foundation, or Windows Server 2012.
    
    Microsoft Internet Explorer 6.0 or higher must be present.
64-bit version:
- Microsoft Outlook 365 and Outlook 2021, 2019, 2016
- The supported Operating system versions are the same as for 32-bit, except when using the 64-bit Outlook Connector, the underlying Windows Operating system must also be on 64-bit architecture.

Note: If you are using Outlook versions marked End-of-Support by Microsoft, they may also work with the latest Kerio Outlook Connector; however, we do not officially support them. You may also use older versions of Kerio Outlook Connector for better compatibility with older Outlook versions.

MICROSOFT WINDOWS

KerioConnect Client for Windows

64-bit versions:
- Microsoft Windows 7
- Microsoft Windows 8.1
- Microsoft Windows 10
- Microsoft Windows 11

32-bit versions:
- Microsoft Windows 7
- Microsoft Windows 8.1
- Microsoft Windows 10
- Microsoft Windows 11

OS X

KerioConnect Client for Mac

macOS 15 Sequoia
macOS 14 Sonoma
macOS 13 Ventura
macOs 12 Monterey
macOS 10.15 Catalina
macOS 10.14 Mojave
macOS 10.13 High Sierra
macOS 10.12 Sierra
OS X 10.11 El Capitan
OS X 10.10 Yosemite

Microsoft Outlook

MS Outlook Version 15
MS Outlook Version 16

Connect Microsoft Outlook 2016 for Mac to Kerio Connect natively. No plugin needed.

WEB BROWSERS

KerioConnect Client

Internet Explorer 11 and Edge
Firefox 23 and higher
Safari 9 and higher
Google Chrome 31 and higher

MOBILE DEVICES

Mobile devices which support IMAP, POP3, CalDAV, CarDAV, EAS, EWS

Kerio Exchange Migration Tool

Installs on Windows Server 2008 R2 (64-bit) and above.
Migrates data from Microsoft Exchange 5.5 (SP4), 2000 (SP3), 2003 (SP2), 2007 (SP1), 2010 (SP2), 2013, 2016

Requires Microsoft Outlook 2007, 2010, 2013, 2016, 2019, 2021

Kerio IMAP Migration Tool

Windows Server 2003 SP1 (32-bit), Windows Server 2008 (32-bit)
Windows Server 2008 R2 and higher (64-bit)
Linux (32-bit, 64-bit)
OS X 10.8 Mountain Lion and higher