Before upgrading ADOIT, you need to make a manual backup of all relevant ADOIT data:
The migration package (containing the repository, the users and the user rights)
The library-specific component settings (view configurations etc.)
Deployment-specific configuration settings (server ports, the standard language the web client should be started with etc.)
For detailed instructions on how to back up all relevant data for an ADOIT upgrade, please refer to the Administration Manual, chapter "Make a Manual Backup".