Hello Ivan,
Thanks for your post.
When messages arrive to exchange, server will resolve the mail address to those users who exist in the directory, there isn't a way to change the behavior which is expected
by design.
To show mail address instead of display name, as a work round, please refer to the following articles for more information:
Outlook (2007) - how to show e-mail instead of name in TO, CC and FROM fields? (Exchange Server)
http://social.technet.microsoft.com/...7-1af8722272ce
Resolve Anonymous Senders Functionality in Microsoft Exchange 2003
http://support.microsoft.com/default...b;EN-US;828770
Messages Received from Internet Display SMTP Address on the To and Cc Lines
http://support.microsoft.com/kb/242301/en-us
ResolveP2 Functionality in Exchange 2000 Server
http://support.microsoft.com/kb/288635/en-us
Hope this helps.
Best regards,
Robbin Meng(MSFT)
Microsoft Online Newsgroup Support
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