I'm currently working on migrating some clients away from Azure's legacy authentication, and I'm wondering if anyone else has gone through this process. We've got a deadline of September 30th, and I'd love to hear about any issues or caveats you've encountered during your migration. What do I need to watch out for?
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I'm curious too, what specific authentication methods are being deprecated in this migration?
I think they're also eliminating SMS as an option for MFA.

They're mainly dropping legacy auth along with some per-user MFA settings.