
Terquem |
seems like it should be obvious, you do not have advantage, nor are you subjected to disadvantage (if one thing gives one, and another thing gives the other, they cancel each other out).
Sneak attack damage can only be applied if
you have advantage
another enemy of the target is within five feet of the target, that other enemy isn't incapacitated, AND you do not have disadvantage on the attack roll

John Robey |

It's pretty straightforward. Drow have disadvantage in direct sunlight; therefore, if they do something that would normally gain advantage, it merely negates the disadvantage, allowing them to act normally. Drow cannot gain advantage in direct sunlight, period. On cloudy days, in thick forests, indoors, or underground, they're fine.
Drizz't overcame that with time and discipline, so presumably other drow could too, but that would be up to the DM to rule on.
-The Gneech