Related list of Purchase Orders created from a Sales Order (Includes Backorders, Dropshipments and Converted to Purchase Orders)
Go to the Settings >> Preferences >> Sales Orders >> Related List and click "New Related List" icon on the top right corner of the page.
Mention a name for this Related List.
Choose the visibility preference only for you or for all users in your Zoho Inventory organization before scripting.
Copy the script and paste it in the deluge space.
Click on the "Connections" button above the Deluge script section on the top right side.
It will open up Connections Section. Click on "+Add connection".
Scroll down Pick Your Service section and click on Zoho Inventory.
Provide the Connection Name as zom and Give Connection Link name as zom as well.
Also Uncheck the box "Use credentials of Login User".
Under Scopes select ZohoInventory.FullAccess.all
Click Create and Connect, it redirects to a pop up window. Click on Proceed.
Click Accept in the next window and Connection created successfully message will be shown.