A. 1. Check for available APIs: Look for any API documentation provided by L'Addition that may allow you to integrate with other systems. Familiarize yourself with the API endpoints and how to use them. 2. Use middleware solutions: Consider using middleware platforms like Zapier or Integromat that can help bridge the gap between L'Addition and other software systems.

B. 3. Manual data transfer: If integration is not possible, consider exporting data from L'Addition and importing it into the other systems manually. This can be a temporary workaround until a better integration solution is found.