Knowledgebase: Exchange
Contact email addresses without a domain name do NOT synchronize to the device
Posted by - NA - on 29 June 2009 11:15 AM
This issue involves contacts created on the Exchange server with an email address that contains a username, but not a domain name (i.e. without @somewhere.com).  When synchronized to the device, the contact's email address field is blank. 

This does not occur when such a contact is created in Outlook Web Access (OWA).  Whatever has been entered in the email address field is synchronized to the device, whether or not it contains a domain name.