Given a main account with an alias, when we configure the persona (in the web client or directly in Outlook), and then create a new mail, the drop down list to select the account from which send the email doesn't appear in outlook 2007, as it should normally appear (it does in Outlook 2003 and web UI).
This feature is very useful and it is very annoying to do not have it in Outlook 2007.
I try to configure an additionnal IMAP account in Outlook, and this action enable the drop down list ... So the feature is available in Outlook 2007, I guess it is just a problem with the connector.
Thanks for your help.