integrate Email

Hi,

I managed integrate all users and user groups from LDAD/AD into Alfresco (Alfresco Community version 5.0.d running on Ubuntu). Also I got sending email (Outbound) in Alfresco working.
But the user profiles in Alfresco missing the email addresses.
Is it somehow possible to integrate the email addresses into Alfresco, or do I have to add the email-address for every user manually? We are using domain Server/AD and gmail.

Thanks in advance for help