KMS Host Keys to Products Activated

Table 7 describes the products that each KMS host can activate.

Table 7. KMS Host Keys Matched to Products They Activate

Volume product group	Windows products	Key type	Products activated by key type
Windows Vista	Windows Vista Business Windows Vista Enterprise	KMS	Windows Vista Business Windows Vista Enterprise
Windows 7	Windows 7 Professional Windows 7 Enterprise	KMS	Windows Vista Business Windows Vista Enterprise Windows 7 Professional Windows 7 Enterprise
Windows Server 2008 R2 Server Group A:	Windows Web Server® 2008 R2 Windows Server 2008 R2 HPC Edition Windows HPC Server 2008 R2	KMS_A	Windows Server 2008 R2 Group A Windows Server 2008 Group A Windows Vista Volume Editions Windows 7 Volume Editions
Windows Server 2008 R2 Server Group B	Windows Server 2008 R2 Standard Windows Server 2008 R2 Enterprise	KMS_B	Windows Server 2008 R2 Group A Windows Server 2008 Group A Windows Server 2008 R2 Group B Windows Server 2008 Group B Windows Vista Volume Editions Windows 7 Volume Editions
Windows Server 2008 R2 Server Group C	Windows Server 2008 R2 Datacenter Windows Server 2008 R2 for Itanium-Based Systems	KMS_C	Windows Server 2008 R2 Group A Windows Server 2008 Group A Windows Server 2008 R2 Group B Windows Server 2008 Group B Windows Server 2008 R2 Group C Windows Server 2008 Group C Windows Vista Volume Editions Windows 7 Volume Editions

Windows Server 2008 R2 KMS keys follow the same hierarchy (groups A, B, C) as Windows Server 2008 with the addition of the Windows Server 2008 Datacenter without Hyper-V™, Windows Server 2008 Enterprise without Hyper-V, and Windows Server 2008 Standard without Hyper-V. The primary difference to note is that Windows Server 2008 R2 KMS keys can be used to activate a KMS host that will in turn activate Windows Server 2008, Windows 7, and Windows Vista.

Windows Server 2008 and Windows Vista keys cannot activate Windows 7 or Windows Server 2008 R2 systems.