Hi James,
According to the error prompt: “A quantity of 1.00 cannot be reserved. You can reserve the quantity manually from the reservation form.” , you should try to reserve inventory manually.
To reserve inventory manually for a sales order, follow these steps.
- Click Accounts receivable > Setup > Accounts receivable parameters. In the General area, in the Reservation field, select Manual.
–or–
Click Sales and marketing > Common > Sales orders > All sales orders. Double-click a sales order. On the Action Pane, in the Show group, click Headier view. On the Setup tab, in the Reservation field, select Manual.
- Click Sales and marketing > Common > Sales orders > All sales orders.
- Depending on the method that you used to set the reservation to Manual, select any sales order, or select the sales order for which you selected manual reservation.
- Double-click the sales order. On the Action Pane, in the Show group, click Line view, and then click Add line.
- Enter an item quantity and other relevant information on the line.
- In the Sales order lines grid, click Inventory > Reservation.
- To change inventory reservations on items that are not delivered, repeat steps 5 and 6.
- Select the warehouses from which inventory should be reserved. Then, in the Reservation field, enter the quantity to reserve.
And for more details, you can check the link below.
Inventory Reservation Process in Microsoft Dynamics 365 (instructorbrandon.com)
Best Regards,
Hana
