I have a work OWA email set up on BIS. I read though the policies and didn't find anything prohibiting it. The company has BES but they charge you to be on it unless you're at a certain management level. My immediate managers know I'm getting OWA email on my BB and they don't see a problem with it. The company does not even enforce a password on the BES devices, which stuns me considering the type of email we get.