Make your way to Forest Song and speak with Architect Nemos.
My people have undertaken an important endeavor in the eastern part of Ashenvale, with support and cooperation from the kaldorei.
Under the supervision of Architect Nemos and Vindicator Vedaar, they are revitalizing an old night elf outpost. The task of building won't be easy, [player], for the challenges and enemies they face are many. I know Architect Nemos and his compatriots at Forest Song would appreciate any help they can get, and he has asked me to send any interested $g men:women; his way.