You don’t need any extra software and you shouldn’t even need to change any settings in Outlook or your Exchange server if you have a DNS server and can add a DNS entry for your FF830.
Set the hostname of the FF830 to match the DNS entry and then you can send mail from Outlook using an address of “FAX=NUMBER@HOSTNAME”, where NUMBER is the number you want to dial and HOSTNAME is the full DNS name of the FF830 (and matches the hostname configured on the unit).
For example, email to:
FAX=5551212@ff830.mydomain.com
You would add a DNS entry on your DNS server to point ff830.mydomain.com to your FF830 IP address, and configure the FF830 hostname to be ff830.mydomain.com. Also be sure to enable T.37.
Your Exchange server should then be able to lookup ff830.mydomain.com in DNS and forward the mail to the FF830.