Regarding that SO – I see that either Customer is not in QB or nor bound. I do not believe that Customer is not in QB – it is rather something wrong with binding. Please check the following:

There is just one Account with such name in SF.

  1. That Account has QB Full Name field populated with Customer Name from QB.
  2. QB Customer has Custom Field AccountID populated.
  3. Value of AccountID field matches SF Account Id.

Please let me know if all these conditions are true.