What does Olivia commend about Malvolio?

Olivia commends Malvolio for his diligence and professionalism as her steward. She appreciates his loyalty and the way he manages her household, valuing his hard work and dedication. However, she also finds his self-righteousness and ambition somewhat off-putting, particularly when he becomes too self-important in his aspirations. Overall, while she acknowledges his merits, she is wary of his arrogance.