iPhone and iPod touch: "Unable to Verify Certificate" message when creating Microsoft Exchange account
Summary
When creating a Microsoft Exchange Account on your iPhone or iPod touch, the Autodiscovery service attempts to use your Exchange email address and password to determine your Exchange Server information and configure your account settings on the iPhone or iPod touch. If the Autodiscovery feature is unable to configure your Exchange account settings, the message "Unable to Verify Certificate" will be displayed on the device similar to this:

Products Affected
iPhone, iPod touch, iPhone 3G, Microsoft Exchange Server 2007
When Autodiscovery is unable to configure your Exchange account settings on your device, tap "Accept" on the "Unable to Verify Certificate" dialog box and manually enter your Microsoft Exchange account settings such as the Exchange Server name and other info.