Rewritew/Change DSCP on UTM

Hello Community,

I have a special testing scenario: We have setup DSCP values on our Computers for Microsoft TEAMS, e.g. DSCP 46 for audio port 3478-3481/UDP. In our test we want to use DSCP only internal in our LAN/WLAN. So, the UTM must rewrite DSCP 46 to for example DSCP 0. 

On our XG firewalls I can do this in a firewall rule. In one location we have the last UTM. How can I do this on UTM?

Thanks,

Ben