it should be available
the game pushes u to make daedra missions but screw that
what if we wanna be a good guy bethesda? u ever thought about that?
oh no we didnt of course we guessed everyone likes to be evil then
And did you not realize that you can actually thwart several of those missions, primarily
Spoiler Mehrunes Dagon's and Vaermina's quests
, not all of the daedra are even evil. Meridia's quest is actually ideal for a Paladin or similarly "good" character build, as is her artifact.
On topic: I was extremely miffed that there wasn't any missions available for the Vigil.