Anyone having trouble connecting your QB account to American Express business account? AE in the last setup step says its waiting for authorization from the Intuit site?
We have an ongoing issue about the error you've received, james-hsieh.
Our engineers are on hand to resolve this one as soon as possible. However, I have a workaround for you.
We can manually import your American Express transactions.
Before doing so, we'll have to make sure that the file is not more than 250KB. Then, it must be a CSV (Comma-Separated Values), Quicken (QFX), QuickBooks Online (QBO), or Microsoft Money (OFX) file. You can ask your bank provider to download the transactions using any of these files.