DRA requires a license key file. This file contains your license information and is installed on the Administration server. After you install the Administration server, use the Health Check Utility to install your purchased license. If needed, a trial license key file (TrialLicense.lic) is also provided with the installation package that enables you to manage an unlimited number of user accounts and mailboxes for 30 days.
To upgrade an existing or trial license, open the Delegation and Configuration console, and navigate to Configuration Management > Update License. When you upgrade your license, upgrade the license file on each Administration server.