Hi, Elizabeth N. McClary,
Thank you for reaching out to us on the Microsoft Q&A platform.
I understand that you need to implement MFA for certain users in a group.
1.Sign in to the Microsoft Entra admin canter as at least a Conditional Access Administrator.
2.Browse to Protection > Conditional Access > Policies.
3.Select New policy.
4.Give your policy a name. We recommend that organizations create a meaningful standard for the names of their policies.
5.Under Assignments, select Users or workload identities.
- Under Include, select users and groups and add required users
6.Under Target resources > Cloud apps > Include, select All cloud apps.
7.Under Access controls > Grant, select Grant access, require multifactor authentication, and select
8.Confirm your settings and set Enable policy to Report-only.
9.Select Create to create to enable your policy.
After administrators confirm the settings using report-only mode, they can move the Enable policy toggle from Report-only to On.
For further information use the below link:
Require MFA for all users with Conditional Access - Microsoft Entra ID | MicrosoftLearn
Thanks,
Prakash V.