PROBLEM Convert to Abobe PDF/Combine files in Acrobat-Acrobat pro 2017 Office 2016 Win10 pro

When I right click on a file (in my case docx) in File Explorer and ask for Convert to Abobe PDF

and

When I right click on two files (in my case docx and pdf) in File Explorer and ask for Combine files in Acrobat

I got the message of the first picture.

I have tried some workaround (no way). I understand that acrobat need to use macro in word.

I understand the problem is on the trust center of word 2016 but I do not know how to include Acrobat as trusted publisher with a certificate. Somebody suggested to open the docx directly in Acrobat to get the message in word to allow its macro but it does not work see second picture - with no effect

PS: creating pdf as export and print in word 2016 works.