No Option to Print on Both Sides of Paper?

What you're describing is known as the print server Advanced Configuration Options if in a MS Windows machine.

On Linux and other Unix-like operating systems, such as macOS, this print server is  known as the Common UNIX Printing System (CUPS) , which was developed by Apple, but is Open Source software, and you can download and install for free.

Every OS provide users with graphical and command line tools to edit printing configuration  preferences and manage printers in a centralized convenient way.

In the case of CUPS  it can  be accessed via telnet or web browser using Internet Printing Protocol (IPP) .

You type in the URL bar of your browser:

http://localhost: 631 

In the case for those of us who also use MS Windows you need to go to Control Panel-->> Hardware and Sound-->>View Devices and Printers.

Left-click once with your mouse to select the default printer icon.

Look a few lines up in that window, and you'll notice that a new toolbar becomes visible.

Click once with your mouse  on the label "Printer Server properties".

The Print Server Properties dialogue box will open.

You'll be setting up your form in thr "Forms" tab.

Below the list box of forms presets, there is a greyed out blank " Form Name"

Tick the checkbox below that blank "Create a new Form" and you will be able to assign a template name, and down below, there is a section "Form description (measurements)".

There is where you input the correct paper size, and the printer area margins. When you're done editing these preferences click on the "Save Form" button. Then click close.

Go back to Acrobat.

Click on Print, and then click on the "Properties" button.

This will open upthe "Adobe PDF Document Properties" dialogue box.

Click on the "Paper/Quality" tab, below in that box follow by clicking on the "Advanced" button.

We're almost there!

This will open another dialogue box " Adobe PDF Converter Advanced Options".

Below the section "Paper/Output" select from the Paper Size dropdown menu the customized form that you created earlier, and click OK to close that window, click OK to close Document Properties window.

Last, click on "Print".

Now you should be good to go.

Sure that make sense.  In my case, everything was already installed, but for some reason the duplex option was not turned on, and I just had to manually turn it on.

Thanks for your reply Anand.  Here's the info you asked for...

I'm using macOS Mojave Version 10.14.3

and I have Acrobat Pro DC version Continuous Release 2019.010.20098

Here's the print dialogue box I get if I print an email:

Here are the print dialogue boxes I get when I try to print a .pdf:

Note that the box to the right opens after I select the (blue button) printer option on the bottom of the box on the left.

I have a new HP OfficeJet 3830 series which has duplexing capability.  Keep in mind I've been printing two-sided no problem until just the other day.  I've read through the article link you supplied.  I don't see anything there that matches what I'm experiencing, and I have re-started my computer and printer.   I've  tried deleting and re-adding the printer in my printer & scanner preferences.  I tried adding it with the HP driver, as well as the AirPrint driver.   I tried looking through my acrobat preferences.  I'm totally stumped.  If you or anyone who reads this is able to shed light on this frustrating situation, I'd be grateful for any input.

Thanks!

That is just informing me that the paper is low in another tray. Doesn't have an affect on this option.