The error message indicates that QuickBooks Enterprise is unable to recognize certain information sent by your application provider, likely due to unsupported special characters.

Step 1: Open the Document

Locate and open the document that triggered the sync error.

Step 2: Check for Special Characters
Carefully review all fields within the document for any special characters.

Step 3: Verify against Unsupported Characters
Refer to the list of characters that QuickBooks Enterprise does not support. Ensure none of these characters are used in the document.

Step 4: Remove Special Characters
If any unsupported special characters are found, remove them from the relevant fields.

Step 5: Save as Draft
After making the necessary changes, click on "Save as Draft."

Step 6: Go to Actions
Navigate to the "Actions" menu.

Step 7: Click on 'Send for Integration'
Select the "Send for Integration" option to initiate the sync.

Step 8: Run the Web Connector
Manually run the Web Connector or wait for it to run automatically at the set interval for the document to sync successfully.