Saying “bye” in Korean would change depending on who is leaving.

If you’re leaving:
안녕히 계세요 (annyeonghi gyeseyo) – formal
안녕히 계십시오 (annyeonghi gyesipsio) – Very formal

If the one you’re saying “bye” to is the one leaving:
안녕히 가세요 (annyeonghi gaseyo) – formal
안녕히 가십시오 (annyeonghi gasipsio) – Very formal

For the first few examples, here’s what they mean. 안녕 (annyeong) literally means “peace” in Korean and we attach 히(hi) to turn it into an adverb.

가세요 means “please go.”
계세요 (gyeseyo) or 계십시오 (gyesipsio) means “please peacefully exist/stay” or “stay well”

세요(seyo) or 십시오 (sipsio) is added to make the sentences into 존댓말 (jondetmal) or the polite and formal language.

Basically, what the first options mean is “Please go/stay peacefully” which sound awkward in English (normal for any translated languages)

I gave you formal ones since you said it’s for a meeting but here are more polite options:

가세요 (gaseyo) – Less formal but not informal, means “Go”
잘 가요 (jal gayo) or 잘 가세요 (jal gaseyo) – Still polite but not too formal, means “Go well”
먼저 갈게요 (na meonjeo galgeyo) – “I’ll go first”
잘 들어가요 (jal deureogayo) – “Go in well”
잘 있어요 (jal isseoyo) – “Stay well”
내일 봐요 (naeil bwayo) – “See you tomorrow”
다음에 봐요 (daeume bwayo) or 나중에 봐요 (nachunge bwayo) – “See you next time”
잘 지내세요 (jal jinaeseyo) – “Take care”
건강하세요 (geongang haseyo) – Also “Take care” but more like “Stay healthy”