You will need to have Double-Take installed on a single server, then you can activate the license on that server using the Double-Take Console. You can repeat this process for other servers individually.
Expand the Licensing section.
If your activation code needs to be activated, you will see an additional Activation section at the bottom of the Licensing section. To activate your code, use one of the following procedures.
The permanent code is specific to this server. It cannot be used on any other server. If the activation code and server do not match, Double-Take will not run.
Once your license has been activated, you will have 60 days to complete your migration process.
If you rename a server that has already has a Double-Take license applied to it, for example if you rebuild a server, you will have to perform a host-transfer to continue using that license. This includes changing the case (capitalization) of the server name (upper or lower case or any combination of case).