Duo SSO for M365 - Service Accounts

I’m trying to protect M365 with Duo SSO. I have some email accounts in my tenant that are service accounts. I have ws-trust configured and only want users in the DuoUsers AD group I’ve created to enroll and use Duo for MFA. I have the policy checked that unenrolled users can bypass MFA. So my service account emails should still work and my users in the DuoUsers group should be prompted by a Duo push when they log into email, correct?

Thank you

Accounts that authenticate using WS-Trust bypass Duo 2FA entirely, so yes, you should see your expected auth results for both service accounts and group members.