In the company setup page (Settings > Company Settings > Company Settings) Administrators can set a permission to allow users (ExpenseCloud users with the role "User" in Manage Users) within the company the ability to setup their own integrations (QuickBooks, NetSuite, etc). This permission is recommended to be turned off. (TriNet Payroll requires this feature to be turned on)
If this permission is turned off, any person with the role user will have this error message displayed when to access the Add On page
A warning message also may be displayed to administrators from the overview page, stating someone in the company has setup an integration. This would be displayed only if the company permission setting is turned off allowing users to setup their own integrations and that a user was able to setup an integration when this permission was turned on.
For more details on sharing and accessing integration data, please see the help topic here.