I’ve converted a purchase order to a bill but the status of the purchase order has not been updated to closed. What is the reason behind it?

By default the status of a Purchase Order (PO) becomes Closed when you create a bill from the purchase order. However, if the inventory add-on is enabled, then the PO will be closed based on the preference chosen in the PO general preference settings. To check this:

• Go to Settings in the top right corner.
• Select Purchase Orders under Purchase.
• Chose the required preference based on when you wish to close the purchase order.
• Click Save to update your changes.