When integrating AutoEntry with Sage 50 Accounts UKI, you can pick between two invoice fields to map to the Ex-Reference column.
Document ID (AutoEntry ID)
Reference Field
Click Home.
Select the relevant Company.
Access the Integrate page.
Under the Settings section, click the Ex-Reference dropdown menu then select the relevant option.
Save your changes.
Once this is done, the selected field posts to the Ex-Ref field in Sage 50 Accounts for when you publish invoices going forward.
📎NOTE: You can't apply this selection to invoices previously published.