Syncing & Online ID

• How do I connect my test?
• I have lost my Oline ID, what now?
• Why is the Online-ID so important?
• Why do I receive the error code TL-409 when linking my test?
• Can I use my LYKON account for more than one person?
• I receive the message that the tests of different persons may not be linked in the same account. What should I do?
• Why do I have to connect my test first?