Add a entity_links table (docs), to be synced to Payments customers.
Add a ledger_account_categories table (docs), to be synced to Ledgers customers.
Add reconciliation_group_id column to the transaction_line_items table (docs).
Add external_id column to the ledger_accounts table (docs).
Add external_id column to the payment_orders table.
Note that existing records will show null values for all newly-added columns by default. Please contact Customer Support at support@moderntreasury.com if you would like to request a historical re-sync of affected tables, and with any other questions regarding these changes.