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The initial installation of Failover Manager does not require a product key. Upon installation you are granted full access to the cluster monitoring and failover features under a Limited Use License for evaluation purposes for a 60-day trial period.At the end of the trial period, you are required to either un-install the software or purchase a valid subscription. In addition, at the end of the trial period, the Failover Manager agents will exit making cluster monitoring and failover non-operational. Failover Manager will send multiple email alerts alerting your system administrator of the approaching end of trial period.To use Failover Manager beyond the evaluation period, you are required to purchase a database server subscription (i.e. Standard Edition with the Failover Manager option or Enterprise Edition) from EnterpriseDB. With the purchase of a subscription you will receive a product key, which will re-enable Failover Manager's cluster monitoring and failover operations. The product key is applied to the Failover Manager configuration file and will restore full functionality for the term of your subscription.After purchasing a product key, edit the cluster properties file, adding the value to the right of the efm.license parameter:efm.license=license_keyWhere license_key specifies the product key you received from EnterpriseDB.You do not need to restart the agents after adding the product key. Every 6 hours, Failover Manager agents check for and validate the product key, so the parameter update will be detected dynamically. For more information about editing the properties file, see .To purchase a database subscription that includes Failover Manager, contact one of the EnterpriseDB offices listed at: