Hello, I am testing a Lumia 900 for work. So far, seems like a decent device but I am having trouble connecting to my work's exchange server via wifi. I don't see anything in the settings that says use wifi or use cellular data. I have tested connecting to the exchange server on my iPhone4s and there is no problem there so I know it's not something being blocked by the exchange server itself. Has anyone else had this problem or know if there is a setting that will use a wifi connection by default if turned on? Thanks