She cannot do anything to process it faster. Usually they check back over here in US about her status and previous adjustments or anything and that takes time. All she can do is hope for the best. It may take couple of week for best case or months for worst case. Just 4 months back, one of my friend got his visa 2 months after they said they need further processing. 

It's better for her to contact her employer telling them the delayed visa processing and to keep her job active.