This is an official Living Forgotten Realms module, publically released by WoTC.
From the Title Page:
For decades, knights-errant of Cormyr have sought glory in the untamed Stonelands. It is common for these knights to bring a retinue of adventurers on such quests, and what better way to make a name for oneself? A Living Forgotten Realms adventure for characters levels 1-4.