QuickBooks Online Sync Error: Error validating Email Address: Please provide multiple email addresses as a comma separated string.

Why the Sync Error occurs

This error occurs when customers or vendors are created in Bill.com and syncing to QuickBooks Online, but commas were not used to separate multiple email addresses in the email information contact field.

How to Fix the Sync Error

There are two options to resolve this issue:

  • Enter commas to separate multiple email addresses ~ or ~
  • Delete all but one email address