Please Remove the unnecessary extra clicks to allow sending as Attachment.
One click to send an attachment is enough. Having to click three times before we get the ability to attach it to an email is ludicrous - it really slows down workflow. COME ON Adobe! Your new updates for Illustrator, Photoshop and Acrobat have made your workflows worse not better
Apologies for the inconvenience caused!
Could you please follow the steps in the below article to use the email icon to send PDF directly as email attachment.
Link : https://helpx.adobe.com/acrobat/kb/send-email-attachment.html
Please let me know in case of any concerns.
Does not work of me on a Mac in Sierra with Apple Mail.