How do i enbed fonts in acrobat dc pro?

The correct place in your workflow to embed fonts is when you create the PDF file, not afterwards in Acrobat. You didn't indicate from what application you are creating the PDF file from (i.e., InDesign, Word, etc.), but the settings used in creating the PDF file determine whether the fonts get embedded or not.

Important Hint! The so-called “standard” settings are lousy for producing proper PDF. If you are using InDesign, export PDF with PDF/X-4 settings and all fonts will be embedded (unless the font itself prohibits embedding). Likewise, if you are using Microsoft Word, “save as Adobe PDF” (not Microsoft's “save as PDF”) choosing the High Quality Print settings and all fonts will be embedded (again, unless the font itself prohibits embedding).

If you no longer have access to the original document and all you have is the PDF file with fonts that aren't embedded, Acrobat does provide a fixup for embedding fonts via the Preflight feature. There is a fixup for embedding missing fonts. Note that this requires that (1) the missing fonts are actually installed on your system and (2) the fonts themselves do not prohibit embedding in a PDF file.

Further note that if you have a PDF file with fonts that aren't embedded, there might be other “issues” that would make it difficult to send such a file for commercial printing, such as rich blacks, imagery that is not of high enough resolution, etc.