@Michael_McGowa1 please come back to the thread and mark my answer as the Solution, thx.
Hey Sanford, that didn't work for me. Researching this more, thought I would share what has worked for me is using the HTML entity of the emoji in the preheader i.e. 📋 for a clipboard.
Can't imagine what you're doing differently, but if you have another way that works for you, great!
Hey Sanford,
I found this thread when trying to understand on to do this. I believe I have somewhat accomplished it, but I am noticing some weird things pull through on Outlook email preview. It looks like its pulling in some of the HTML code from the email, do you know why this may be?
Can you send me that email? Easier than looking at all the source code here.