If you already planned a route, and you have a list of addresses to add to this route, follow these steps:
2. In the Import Wizard, under Step 1, check Append to current addresses.
3. Uncheck “Set first as Start Address”, “Return” and “Set last as End Address”.
4. Review your addresses and click Import Now.
5. These addresses will be added to the map.
6. Click Next and then Plan My Route.
Alternatively, you can click Manual Changes and these addresses will be re-optimized with your entire route.