Acrobat Standard DC ignores print area when combining Excel files

Hi, I am using Acrobat Standard DC 2015 and Excel 2016 (Office 365 ProPlus).

When converting individual Excel file to PDF or saving it as PDF, only printed area is shown which is fine.

However, when using "Combine Files" option (single or multiple Excels), printing area is ignored.

How can this be controlled ?

Regards,