Quickbooks Online Sync Error: 6240 - Duplicate Name Exists Error

If you are seeing this kind of error in your QuickBooks Online sync log, it is due to either:

• The vendor or customer having the same name.
• The vendor or customer name contains ampersand - &
  • This is a quickbooks limitation - there's nothing we can do.
• We are unable to look up or create the vendor/customer name in QuickBooks Online.

This is how you resolve it:

• (SKIP: if the customer already exists in QuickBooks Online) If not, create a customer manually in QuickBooks.
• Manually map the customer in Yoprint to the QuickBooks Online customer account. (Follow the screenshot step by step)

Click the "School Customer" (your sales order customer name)

Click "Map Manually" in the customer dialog.

Search and select the QuickBooks Online customer's name.