That's the problem - Those of us who did it did it 6 months ago at the very least.
EDIT: I dug up the journal entry.
"Midnight Dew is willing but unable to help, as Hatchling went missing in an area of the Ruling Quarter untraveled by Idyllshire's inhabitants. However, a wandering goblin trader has been known to pass through there. He can be persuaded to help should you deliver to him three chunks of high-quality adamantite ore. This, Midnight Dew informs you, can be mined in Azys Lla - though she herself has never heard of it, and doubts it exists at all."
So, Midnight Dew is the one who informs you that Adamantite can be found there. They know of the Azys Lla name, but do not know if it actually exists. Chances are, they've confirmed it exists during MSQ.
EDIT: I dug up the journal entry.
"Midnight Dew is willing but unable to help, as Hatchling went missing in an area of the Ruling Quarter untraveled by Idyllshire's inhabitants. However, a wandering goblin trader has been known to pass through there. He can be persuaded to help should you deliver to him three chunks of high-quality adamantite ore. This, Midnight Dew informs you, can be mined in Azys Lla - though she herself has never heard of it, and doubts it exists at all."
So, Midnight Dew is the one who informs you that Adamantite can be found there. They know of the Azys Lla name, but do not know if it actually exists. Chances are, they've confirmed it exists during MSQ.