With a Synology Virtual DSM license, you can run Virtual DSM on Virtual Machine Manager to enjoy the full range of features provided in the standard DiskStation Manager, including file services and add-on applications. Virtual Machine Manager enables High Availability, ultra-fast snapshots, and protection plans, which helps enhance system up-time and management flexibility.\n\nLicensing Plan\nEach Virtual DSM license pack adds one Virtual DSM instance to Virtual Machine Manager. A license supports Virtual DSM upgrades within a three-year period.\n\nThis license pack cannot be returned once opened.\n- Before purchasing this license pack, check the compatibility of your Synology NAS with Virtual Machine Manager. \n- This license pack can only be applied to one Synology product at a time.\n- This license pack can be used to extend the Virtual DSM upgrade support of an existing instance.\n\nActivation and Mapping\nIn Virtual Machine Manager, go to License > Virtual DSM and click Add. Your Synology NAS must be connected to the Internet when you add the license. \n\nUpgrade Period\nEach Virtual DSM license comes with a 3-year software upgrade period for the Virtual DSM package. You can extend the upgrade period by activating a new license key for Virtual DSM.