disable modern authentication office 365

PLAN FIRST: In Azure Active Directory (AAD) Admin Center use Sign-In Logs with 'Client Application' filter applied to see what users or devices are still using Basic Authentication. Wondering how a Hybrid configuration will be affected. If we were On-prem Only, we could continue to use Basic Authentication past the Oct 2022 deadline. We then removed the registry key EnableADAL0 and deleted all. Microsoft has a thorough advisory link: Here is my summary: If we were using Office 365 Only, we would be forced to update our application to use Microsoft Modern Authentication. The above command installed the Microsoft AAD broker which is required in Windows for Modern Authentication to work correctly. Don't wait until the last minute! Basic Authentication is putting your organization at risk today. Unprepared organizations will find their users cannot access email or other resources. OctoBasic Authentication (aka Legacy Authentication) will be deprecated in Exchange Online (Microsoft 365 platform).

Disable modern authentication office 365