How to direct the traffic of OneDrive and Sharepoint access to another public network

Hi There,

We have a  XG430  firewall with 2 different dedicated network, we want to route  the traffic of Microsoft OneDrive and Sharepoint access to another network, as this network did not have so many access , can you show me how to do this in our firewall step by step in details  ? as i have not idea how to do this, thank you so much for your support.

Best Regards,
Eric