Ok folks, got it, here it is:
tell application "Microsoft Outlook"
set theAccount to the first pop account whose name is "The-name-of-the-account-you-want-to-use"
set theContent to "Mail Content etc."
set theMessage to make new outgoing message with properties {account:theAccount, subject:"Test", content:theContent}
make new recipient with properties {email address:{address:"to@mail.com"}} at end of to recipients of theMessage
make new recipient with properties {email address:{address:"to@mail.com"}} at end of cc recipients of theMessage
open theMessage
end tell
Posted in case anybody else is looking for it.