Hi I have a network with 3 back-end exchange servers.
Each server has it's own OWA address on the internet, and windows mobile and iPhones connect to all 3.
2 of these servers currently have GeoTrust Premium SSL certificates, the other one is self-signed. The GeoTrust certs are expensive, and the self-signed server seems to be working ok (although I think the PDA users get an certificate warning that they have to click past when they connect to the server).
Should I invest the money to get a GeoTrust SSL cert for the 3rd server and bring it in line with the other 2?