What is synchronised, and how often

• Every minute: changed customers, vendors, items, accounts and documents (invoices, receipts, bills, cheques, deposits, transfers and more).
• Every ten minutes: QuickBooks reports such as profit & loss, balance sheet, trial balance and aging.
• The first sync brings in the full history and can take longer for large company files; you can work while it runs.

The status is shown in Preferences > QuickBooks and on the dashboard.