Welcome to the RingCentral Community

Hey, Bill! Checked in with Support and learned the following:

The only way to accomplish what you're suggesting is to have a fax only number, assign it to an extension, then list a distribution list in the notification settings. There is no way to set up the system to automatically filter faxes to an individual person(s).

We would not be able to link the RC system with the IP office system.
The way that is outlined above is the only way to have a fax be distributed to multiple people.

Hope this helps! Please reach out to Support directly if you need help with this setup.