[B.W.]

I want to send an email with an invite, so I have created a word doc with a
fancy border around it. I cant send this as an email via word without
losing the border. So decided to save the doc and just attach in an email.
However I get this message on my other PC when trying to open this email.

Cant display border art. this feature is not currently installed. Would you
like to install it now?

Why is it doing this ,what is this feature, is it a different Word build or
something?

TIA

B.W.