The Integrated Applications section of the preferences section has to do with all of the applications that can be linked up with QuickBooks. 

Many applications can be used in conjunction with QuickBooks, too many to cover here. So we will just cover the general options in this section. The only tab available in this section is the Company Preferences tab.

• Don’t Allow Any Application to Access this Company’s File
  • Selecting this option will cut off any outside applications from being able to use the files and records in this company.
• Notify the User before Running any Application whose Certificate has Expired
  • Most legitimate applications that work with QuickBooks have a certificate to prove that they are authentic and are not going to steal information from the company file. Turning this option on will notify users if the certificate is out of date.
• Applications that have Previously Requested Access to this Company File
  • This section contains a list of all of the Integrated Applications that have previously attempted to access this file. From here you can view and change the properties of each application. You can also remove applications from the list, or cut off an application’s access.