OneDrive for Business routing

Hey,

We have two ISPs on a Cluster of FG200E, one (ISP A) which we use as our standard route and one (ISP B) we use for http/https(80,443). For that we´ve configured policy routes. So OneDrive is using the second ISP cause it uses port 443.

My goal is that OneDrive for Business uses ISP A even the rest of 443 traffic is still routed through ISP B.

My first try is set up a static route which says "Internet Service O365 use route through ISP A" but it looks like the policy route overrides this.

My next idea is to set up an address group which contains all dns names from Ms OneDrive for Business (https://support.office.com/en-us/article/office-365-urls-and-ip-address-ranges-8548a211-3fe7-47cb-abb1-355ea5aa88a2#bkmk_spo) and route it via policy route through ISP A.

But for that we have to maintain the list by our self...

Maybe anyone knows a better way how to route OneDrive for Business through ISP A?

Thanks,