Multi-factor authentication will become mandatory in October for all administrators logging into their Azure backends.
Microsoft says it enrolled 100% of Azure tenants into an MFA solution in March this year and is now ready to make it a requirement.

Azure mandatory multifactor authentication: Phase 2 starting in October 2025 | Microsoft Azure Blog
Microsoft Azure is announcing the start of Phase 2 multifactor authentication enforcement (MFA) starting October 1, 2025. Learn more.

Microsoft Azure Blog (azure.microsoft.com)