We recently updated our connection options with American Express and have the ability to collect transactions and statements. 

Add American Express through MX. Mastercard no longer has access to American Express, so LedgerSync does not add American Express through Mastercard. An old Mastercard connection to American Express cannot be fixed: add American Express again through MX instead.

Once the connection is made, the transactions and statements come into LedgerSync.

The Ledgersync team custom coded our own transaction and statement fetching to help resolve the issue initially caused by AMEX discontinuing access to their data through the API.  The Ledgersync connection adds the subaccount name into the front of the bank memo to make it easier to distinguish which transactions are part of each card.

To export these transactions as a .QBO, .OFX, or .CSV file, you should first filter down to a specific sub account before downloading  as a .QBO or .OFX.  This will ensure you can import the data into your platform of choice and that transactions are only loaded into the account of choice.