To be clear, if I add numbers to my chart of accounts, outside applications (like Salesforce, Payroll processors, banks, etc.) that have mapped to my QBO accounts, will continue to be able to post to my previously mapped QBO accounts as before the addition of numbers to the COA?

I received a QB support phone call before the online answer was posted and received information contrary to the guidance above. He indicated that I would lose all of those previously mapped account relationships.

I would like to be certain of the impact so I do not have to remap hundreds of account relationships.