I am looking for information for a client that may be moving to BES for Exchange. They are a financial institution and have all internet running through proxy so everything gets logged.

I believe BES supports this but where can I find documentation indicating this?

How do you disable all other internet on the handheld besides what goes through proxy?

I tried looking through the IT Policy spreadsheet posted here for the specific policies related to this but there is are to many and it could take a while.

Appreciate any and all guidance.

IF you wish you could disable BIS broswing via IT Policy, and then just configure your BES to use a proxy server. Also you can setup white and black list for web sites that you allow them to go to within the MDS-CS pull rules.