If your organisation has a Microsoft server product with active Software Assurance, you have the right to use Volume License media to install the same software on a server that is turned off until an emergency situation, known as a cold server. In a disaster, this server can be moved into production so that users can continue to access critical data and applications.
You have one disaster recovery license for each server license with active Software Assurance.
After Software Assurance expires, you can continue to use cold backup software already installed, but you cannot install any additional cold backups.