According to Variety, actor/writer/producer B.J. Novak has extended his work on ‘The Office’ through season 8:
B.J. Novak has cut a deal with Universal Media Studios that covers his services as an actor and writer-producer on “The Office” through its seventh and eighth seasons. He’ll be upped to exec producer status (from co-exec producer) about halfway through the show’s upcoming seventh season. Pact also includes a development component for Novak to field new projects for the studio.
Related link: The Office Season 8 spoilers and news