I have inherited a SBS2003 machine and am setting up a couple of iPhones to get Exchange emails. (I have done this 100 times in the past on previous servers so am familiar with the procedures, required ports etc and have a third party SSL cert installed).
When setting up the account on the phone, it connects to the server fine and allows me to choose mail/contacts/calendar, which indicates that the account has definitely been set up correctly. When I go to the mail screen however, the phone takes a few seconds before giving the 'connection to the server failed' message.
Outlook web access works fine on the server, as does IMAP, but the customer wants full Exchange functionality and that is what we promised them also.
There is nothing untoward being reported in the Event log.
Is this something to do with the oma or activesync sites in IIS?