Learn Hardcore Icelandic: Eftir ráðstefnuna mun hún hafa hitt marga nýja vinnufélaga. - After the conference she will have met many new coworkers.

Gender: <a class="border-b border-dotted border-blue-400 dark:border-blue-500 cursor-pointer text-inherit no-underline" href="/grammar/icelandic/nouns/gender-overview">masculine
Number: <a class="border-b border-dotted border-blue-400 dark:border-blue-500 cursor-pointer text-inherit no-underline" href="/grammar/icelandic/nouns/plural-basics-a1">plural
Case: <a class="border-b border-dotted border-blue-400 dark:border-blue-500 cursor-pointer text-inherit no-underline" href="/grammar/icelandic/nouns/case-overview">accusative (as the object of “hafa hitt”)

Icelandic has no single future tense ending like English -will-; instead it uses munu + infinitive.
To make a future perfect (“will have done”), Icelandic uses:

munu + hafa + past participle
Hún mun hafa hitt … = She will have met …

In the whole sentence:

Eftir ráðstefnuna mun hún hafa hitt marga nýja vinnufélaga.
After the conference, she will have met many new colleagues (by that time).

Why is it ráðstefnuna and not ráðstefnan?