MFA using DUO for multiple office 365 domains in a single tenant synced from On-Prem AD

Hi,
We have multiple verified domains in our office365 tenant which are being synced from the On-Prem AD Forest(1) and multiple domains in that single forest(3).

We have already deployed MFA for our office 365 accounts for one of the domain (Domain1.com). We now need to deploy the MFA for other domains in the office 365 account(Domain2.com & domain3.com).

I am not able to “Enable AD Federation to Office 365 using DAG” which worked for one domain(domain1.com).

What are the solutions to get this done? Appreciate your help.

Thanks.