Adobe Reader 2020: an error occurred while sending mail

[andreav23439345]

Hello,

we have this error "an error occurred while sending mail" on a client.

The pc is Windows 10 1909 with Office 365 installed and updated.

If we try to attach a pdf using the sending email feature in Acrobat Reader we get the error "an error occurred while sending mail".

I have already tested this solution 

https://community.adobe.com/t5/acrobat-reader/adobe-reader-attach-to-email-is-not-working/td-p/33048...

But in this case it doesnt' work

What can I do to fix ?

Regards.