email – Exchange 2010 interprets the full name incorrectly

I've investigated a problem with the emails that appear in Outlook First name@ (without the e-mail address), and it seems that the e-mail address is sent under the display name such as

prenom@email.com 

In Outlook, the To: field appears as follows:

First name@ 

This only seems to be a problem in Exchange 2010 (the company I work for still uses it), I did some tests with Gmail and everything is fine.

"Prenom@gmail.com" 

Is this a problem specific to Exchange 2010? Would this problem be solved in a newer version?