Adobe was reported to be threating Microsoft with anti-trust complaints in the mid-2000s, as Office had started to include support for outputting PDFs without n

Adobe was reported to be threating Microsoft with anti-trust complaints in the mid-2000s, as Office had started to include support for outputting PDFs without needing to buy a plugin from Adobe. I imagine they've steered clear of stepping on Adobe's toes since then. The PDF functionality in Edge avoids these problems, as it's a standard web browser feature these days.