We're updating some of our product names. K2 Five is now Nintex Automation. You may see both product names in our help pages while we make this change.

Software Requirements and Prerequisites by component

This topic describes the minimum software requirements per K2 product and per product component/machine role in a K2 topology.

For updated and additional information on integration and compatibility of K2 with other technologies, please refer to the Product Compatibility, Integration and Support Matrix.

For reference information on the Windows Server Roles and Features expected in your environment when installing K2, see the topic Windows Server Roles and Features.

K2 supports IPv4 and IPv6. K2 will operate as expected on environments where IPv6 is the only IP configuration
All machines running K2 components (for example, K2 Server and K2 websites) require TLS 1.2. Although TLS 1.3 can exist on these machines in addition to TLS 1.2, K2 does not use TLS 1.3.
K2 will not operate as expected in environments where TLS 1.3 is the only configuration enabled.

Server Components

The table below lists the software/feature prerequisites or minimum requirements for server components (for example the K2 Server and K2 Site components) in a K2 topology.

If necessary, you can force K2 to run at the latest supported version of the .NET Framework in your environment. For more information see the Microsoft article: Version Compatibility in the .NET Framework. Find the <supportedRuntime> elements mentioned in the article, in the K2HostServer.exe.config file in your K2 installation folder, typically: %PROGRAMFILES%\K2\Host Server\Bin.

K2 Component	Required/Optional	Prerequisite/Requirement
K2 Server (K2 application server)	Required	Supported version of Microsoft Windows Server
		User Manager Read More... The default User Manager is Active Directory (AD), but a custom user manager may be configured for use with K2.
		Supported version of Microsoft .NET Framework and .NET Core
		Windows Identity Foundation Redistributable Read More... For more information, see http://support.microsoft.com/kb/974405.
		Supported version of Windows PowerShell
		Supported Browser
		For the K2 server to send email, an SMTP server supporting: Internet Simple Mail Transfer Protocal/Post Office Protocal 3 (SMTP/POP3) Internet Message Access Protocal 4 (IMAP4)
	Optional	Supported version of Oracle. 64-bit Oracle Data Access Components Read More... If the ODAC is not installed prior to registering a new service instance, an error is generated saying the assembly cannot be loaded because it is either not present or one of its dependencies is missing. Download
		Windows Support Tools Read More... Windows Support Tools is a prerequisite if the installer is to automatically set the SPNs during the installation of K2. For more information see http://go.microsoft.com/fwlink/?LinkId=62270
		Microsoft Exchange If Microsoft Exchange 2013 is being used, Windows Powershell 3.0 or later and WinRM (Windows Remote Management) are required, both of which are part of the Windows Management Framework: https://www.microsoft.com/en-us/download/details.aspx?id=34595 For more information see Exchange Integration
K2 database	Required	Supported version of Microsoft SQL Server
K2 database	Required	Supported version of Microsoft .NET Framework
K2 for SharePoint (While this component is optional, if you are using it, the items to the right are required)	Required	Supported version of Microsoft SharePoint (Integration with SharePoint Online or SharePoint 2013 and later requires the K2 for SharePoint component. ) K2 supports only one SharePoint on-premises farm per K2 environment. There may be additional requirements before installing or using K2 for SharePoint for SharePoint Online or 2013 and later. See the Preparing SharePoint On-Premises topic.
		See Preparing SharePoint On-Premises for more information on preparing your SharePoint environment.
		Corresponding version of K2
		Supported version of Windows PowerShell
		Supported browser
K2 Designer Site	Required	Supported version of Microsoft Windows Server
		Internet Information Services (IIS) 8 or 10
		Supported version of Microsoft .NET Framework.
		The corresponding version of K2 must be installed on a server that is reachable from this machine. For improved performance it is recommended to install the K2 Designer Site on the same physical machine as the K2 application server, see Improving Performance.
K2 Runtime Site	Required	Supported version of Microsoft Windows Server
		Internet Information Services (IIS) 8 or 10
		Supported version of Microsoft .NET Framework.
		The corresponding version of K2 must be installed on a server that is reachable from this machine. For improved performance it is recommended to install the K2 Runtime Site on the same physical machine as the K2 application server, see Improving Performance.