With Sage 300 you can simplify the task of creating and sending invoices to your customers. Accelerate invoicing with the recurring charge feature in Sage 300. It allows you to create a recurring charge for your customers and specify billing frequency. You can have as many schedules as you need. It takes the tedium out of invoicing, reduces errors and improves cash flow. Resulting invoices are ready for final approval in minutes.

I have made a video demonstrating the process. You can watch it here https://youtu.be/Cby7XGLdCKw