If you are just moving the software to a new server, then follow the steps below:
Copy the current Active Administrator shared folder to a local drive on the new server.
Have the Active Administrator license available for the new installation.
Extract the Active Administrator installation package on the new server and launch the auto-run.
Verify the prerequisites are met.
Install the Active Administrator Server.
Run the AA Configuration Wizard. Select existing Active Administrator database and Archive database or create new ones.
Install the Active Administrator console.
If you created a new Active Administrator database, you will need reinstall the audit agents within the Active Administrator console under Auditing & Alerting | Agents.
Will you also be moving the Active Administrator databases to a new server?
It would be best to install version 8.2 on the new server and create a new database. If you would like to keep the old database for history audit reports, then you can upgrade it manually using upgrade scripts from 5.1 to 8.2 and convert it an archive database. You can migrate any custom reports, alerts, settings from the old database to the new database by using the AA Database Migration tool.