FinalBuilder Server will allow a single user (including the the default admin user) to log in until one or more valid user licenses have been uploaded to the management server.
Uploading a License
You can upload a license file to the management server by browsing to the file and clicking upload. This will add all the licenses contained in the license file to the management server.
To view the current usage of user licences, you can view this information on the Users page.