I seeking some advice for Outlook (thick client) access to a remote exchange server, i.e. via interweb. I have exchange webmail enabled and I'm currently using HTTP activesync successfully on mobile devices. I've set HTTP connection on Outlook client and verified that the Exchange host IP address resolves correctly, however, I'm wondering if I need to open additional ports to the Exchange server to allow remote access, i.e. other that the SSL currently open?