Windows Server® Downgrade

Quelle: LINK

Downgrade and down-edition rights are an end-user right that Microsoft offers to customers for certain Windows Server OEM or ROK products which meet the technical requirements for a Windows Server software downgrade. Downgrade rights are documented in the Microsoft Software License Terms that customers accept upon first running Windows Server software. Thanks to downgrade rights, end users who have acquired a later version of the software (such as Windows Server 2012 R2 Standard) can use an earlier version of the software (such as Windows Server 2008 R2 Standard) until they are ready to migrate to a later version technology.

If a product includes downgrade rights, the license terms for that product will indicate which earlier versions of the software may be used.

Windows Server Downgrade