Adding From and Bcc to the New Message bar
In Outlook 2007, select ‘New’ to create a new message 
On your new email window select ‘Options’, then select ‘Bcc’ and ‘From’
In webmail, select 'New' to create a new message 
On your new email window select ‘Options’
An additional screen will open and select the box ‘show bcc’
Bcc: will now show up as an option for your outgoing messages