When you hover the Infusionsoft logo on the top left, the master nav menu is displayed. The master nav menu is comprised of several columns to help you find something fast
Click on the Orders button under E-commerce column
Now you can search your orders that have been synced using either First Name ,Last Name or Order Total.
If you want to view all the orders that have been synced enter ORDER_ID in field right to Main Search label and click Search button present at the bottom. It will display all the orders that have been synced.