I am using self generated certificates and OWA does work fine externally and internally. The phones are synching everything also. My problem is that I'd like to synch the global address book but looking at another posting it says to use the owa url (mail.company.com/owa) in the server name instead just the mail.company.com example. Unless I am misunderstanding that. I tried that and it didn't work. I was successfully able to install the root certificate on the phone but if I install the self signed owa certificate it says it's not a trusted root certificate. How can I get this to work? I can access owa from the phone even. I desperately need this for a couple of my users.