Multi -Instance available only in QuickBooks Accountant 2011, and QuickBooks Accountant Enterprise 11.0. Does not allow the same QuickBooks file to be open concurrently, must be two different QuickBooks files. The following features are not available in second instance: QuickBooks Messenger, payroll. The following features are unavailable in both instances: unlocking or purchasing additional features/seats, TurboTax integration, Intuit Data Services setup, applications that use the Intuit Software Development Kit (SDK) to communicate with QuickBooks. The following features are available in one of the two instances: multi-user mode, file hosting, QuickBooks Help and Live Community. Other features not listed above are impacted and additional restrictions apply in either the first instance, second instance or both instances; See www.accountant.intuit.com\mi for a list of restrictions.