
Hi Brian Hall,
Thank you for posting your query on Microsoft Q&A!
You are correct, migrating to Authentication methods policy in Entra ID will not enable MFA for your users who are currently not enabled for MFA.
If you have any P1 or P2 licenses one thing to keep an eye on is the "Microsoft Managed" Conditional Access policies, these may appear in your tenant and if not disabled within 90 days can prompt your users to setup MFA. We have details on these here - https://learn.microsoft.com/en-us/entra/identity/conditional-access/managed-policies
Let me know if you have any further questions or concerns, I would be happy to help!
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