Ah, I see, much clearer. With the caveat that I don't fly the Kangaroo Route form Europe, business class tickets are now sometimes sold in different flavors, same as economy ones -- pricier "flex" tickets that permit changes and refunds, discount tickets that permit no changes and are sometimes non-refundable (I think those often show as Z class, though it varies by carrier), and sometimes gradations in between -- e.g. changes permitted if you pay a fee, etc.

So there is no simple answer, but in your case I would angle for the full whack -- roundtrip / return "flex" ticket with an arbitrary return trip date that you can change later. Even if there's a fee for changing the return that you end of paying, it would be worth it.

I just searched Emirates CDG-DXB-SYD and return in business class for you, out 17 Sep back 17 Dec, and there are no discount options showing but the full whack, including unlimited changes, is EUR4931 which doesn't seem so bad. KLM will do you the same and run EUR5111 for those dates, via AMS and KUL, last leg on Malaysian.

You can get better deals, with restrictions, through travel consolidators and sometimes Asian travel agents with connections to Asian lines like Cathay or Singapore. But the straight fare doesn't seem like so much money and considering you've been sacked and had your heath cover yanked I would see if I could find a way to make the company purchase the entire aircraft for you.