About multi-user QuickBooks
By answering Yes, you are allowing other users to open company files that are
located on this computer as long as they have valid user names and passwords.
To protect your company information from unauthorized access, Intuit recommends
that you set up permissions.
To provide other QuickBooks users with continuous access to company files located
on this computer, you must leave this computer on. However, you can close QuickBooks.
About setting up multi-user QuickBooks