https://support.extyles.com/support/solutions/articles/11000003794-word-2016-no-longer-supports-arial-unicode-ms-font-affects-circled-letter-number-characters-
Word 2016 no longer supports Arial Unicode MS font : eXtyles Support
Microsoft has removed the Arial Unicode MS font from Word 2016, the only font included in Word that encompasses the Enclosed Alphanumerics subset
arial unicode msno longerwordsupportsfont