There are certain requirements for a task to be synchronized into your Outlook.
Make sure all of them match:
- Check the settings menu. You are logged in and the task synchronization is activated in the settings. The settings can be found in the menu on your name in the top-right corner.
- Verify if there are no messages for you in the alert menu.
- You need to be assigned to the task explicitly. (If you want to synchronize task without being responsible, you can remove the flag "Only sync tasks that are assigned to you" in the basecamp settings
- Todo is in status "open"
- The due_date is in the future