Change page size to a smaller format

Hi

We have some problems resizing a PDF document to a smaller page size (f.e. A4).

It seems Adobe Acrobat Pro DC creates a PDF document with a page size that is larger in width than an A4 document.

We already tried the following things:

• We printed the PDF file to an A4 document with the Adobe PDF printer, but this causes all our form elements to disappear. 90% of all form elements are also not accessible anymore in the printed PDF.
• We tried to set the page size using different options like f.e. "organize pages" => "set page boxes" => "Change Page Size". However, when we try to set the page size to the exact dimensions of an A4 document, we get the well known error "Page Size may not be reduced".

Finally we used a trial version of the MapSoft plugin to changed the page size to that of an A4 document.

This works, but in our opinion this should be possible in Adobe without using external plugins. Could it be that we missed some kind of option in Adobe Acrobat Reader Pro DC?

Thanks.

P.S.: If the document doesn't have the exact A4 page size, some of the text doesn't fit in predefined boxes on our template paper. Also, the printed document doesn't look the same on different printers if the A4 page size is not used.