To deploy Multi-Factor Authentication (MFA) for only the members of the Sg-Finance group, excluding Debra Berger, and without using a Conditional Access policy, you can follow these steps:

Open the Microsoft Entra admin center:

Sign in as a Security Administrator or Global Administrator.

Navigate to MFA settings:

Go to Users > Active users.

On the Active users page, select Multi-factor authentication.

Manage user settings:

Find and select the Sg-Finance group.

Enable MFA for this group by setting the requirement status to Enabled.

Exclude a user from MFA:

In the Multi-factor authentication page, search for Debra Berger.

Set her MFA status to Disabled to exclude her from MFA registration.

Verify the configuration:

Ensure that all members of the Sg-Finance group have MFA enabled except for Debra Berger.

Communicate the change:

Inform the Sg-Finance group members about the MFA requirement and provide instructions on how to register for MFA.

Monitor the setup:

Check the sign-in logs to confirm that MFA is being prompted for the Sg-Finance group members and not for Debra Berger.