I have a client that got an Iphone and I had the hardest time getting it to connect to the SBS 2003 Exchange. I found this article on line and it worked for me!
Exchange 2003 and Activesync Configuration and Troubleshooting
Thank you Alan!
Here is a local copy of the article.
The part that got me going is this:
Microsoft-Server-Activesync Virtual Directory
• Authentication = Basic
• Default Domain = NETBIOS domain name – e.g., yourcompany*
• Realm = NETBIOS name
• IP Address Restrictions = Granted Access
• Secure Communications = Require SSL and Require 128-Bit Encryption NOT ticked
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