Hyper-V integration services, are a bundled set of software which, when installed in the virtual machine improves integration between the host server and the virtual machine. Integration services (often called integration components), are services that allow the virtual machine to communicate with the Hyper-V host. Hyper-V Integration Services is a suite of utilities in Microsoft Hyper-V, designed to enhance the performance of a virtual machine’s guest operating system.

In short and general, the integration services are a set of drivers so that the virtual machine can make use of the synthetic devices provisioned to the VM by Hyper-V.

Hyper-V Integration Services optimizes the drivers of the virtual environments to provide end users with the best possible user experience. The suite improves virtual machine management by replacing generic operating system driver files for the mouse, keyboard, video, network and SCSI controller components. It also synchronizes time between the guests and host operating systems and can provide file interoperability and a heartbeat.

Below is the list of Integration Services Version numbers

Windows Server 2008

Build Number Knowledge Base Article ID Comment
6.0.6001.17101 n/a Windows Server 2008 RTM
6.0.6001.18016 KB950050 Windows Server 2008 RTM + KB950050
6.0.6001.22258 KB956710 Windows Server 2008 RTM + KB956710
6.0.6001.22352 KB959962 Windows Server 2008 RTM + KB959962
6.0.6002.18005 KB948465 Windows Server 2008 Service Pack 2
6.0.6002.22233 KB975925 Windows Server 2008 RTM + KB975925

Windows Server 2008 R2

Build Number Knowledge Base Article ID Comment
6.1.7600.16385 n/a Windows Server 2008 R2 RTM
6.1.7600.20542 KB975354 Windows Server 2008 R2 RTM + KB975354
6.1.7600.20683 KB981836 Windows Server 2008 R2 RTM + KB981836
6.1.7600.20778 KB2223005 Windows Server 2008 R2 RTM + KB2223005
6.1.7601.16562 n/a Windows Server 2008 R2 Service Pack 1 Beta
6.1.7601.17105 n/a Windows Server 2008 R2 Service Pack 1 RC
6.1.7601.17514 KB976932 Windows Server 2008 R2 Service Pack 1 RTM

Windows Server 2012

Build Number Knowledge Base Article ID Comment
6.2.9200.16384 n/a Windows Server 2012 RTM
6.2.9200.16433 KB2770917 Windows Server 2012 RTM + KB2770917
6.2.9200.20655 KB2823956 Windows Server 2012 RTM + KB2823956
6.2.9200.21885  KB3161609 June 2016 update rollup for Windows Server 2012

Windows Server 2012 R2

Build Number Knowledge Base Article ID Comment
6.3.9600.16384 n/a Windows Server 2012 R2 RTM
6.3.9600.17415  Windows Server 2012 R2 RTM + KB3000850
6.3.9600.17831 KB3063283 Windows Server 2012 R2 RTM + KB3063283
6.3.9600.18080 KB3063109 Windows Server 2012 R2 RTM + KB3063109
6.3.9600.18339  KB3161606 June 2016 update rollup for Windows Server 2012 R2 
6.3.9600.18398  KB3172614 July 2016 update rollup for Windows Server 2012 R2
6.3.9600.18692 June 27, 2017—KB4022720 (Preview of Monthly Rollup)