Starting with CRM Online 2015 Update 1 and CRM 2016 On-Premises Export to Excel behaves differently.
The dialog box which offered the setting "Make this data available for re-importing by including required column headings" no longer shows.
As at 29th June 2016
Adxstudio portals version 7.0.0018 to 7.0.0022
- are supported by pay per incident processes
- can be installed on Microsoft Dynamics CRM On-premises versions 2015 and 2016 and CRM Online
- Trial keys are no longer issues
Adxstudio portals version 8.x and later
At the time of writing (according to https://support.microsoft.com/en-us/kb/3165165):