---afaik, there isn't a quest with that name, but there is an achievement. It can be done in Grathwood, just north-east of eldenroot.
Small walkthrough:
1: go to elden root temple wayshrine and walk west (alternativly, go to elden root wayshrine,leave the tree eastwards and follow the path north.
2: at the crossroads, you will find a bosmer and an altmer arguing. Talk to them and settle the dispute. It isn't a quest, nor has any map indication and it is a very small encounter.