Once set up Inventory Advice's can be sent to your Retailer through the Item Retailer Settings page
settings cog => Items => Item Retailer Settings
Items that have the Send Inventory Advice enabled will be sent in the report. This field can be auto configured on some ERP systems.
simply click "Send Inventory Advice".
If sending for a specific Retailer then Document type needs to be set under
Settings cog => Retailers
This information can be configured to be sent automatically through task scheduler.
Please see the attached video for more information.