Security News > 2021 > October > A Guide to Shift Away from Legacy Authentication Protocols in Microsoft 365

Microsoft 365, formerly called Office 365, is Microsoft's cloud strategy flagship product with major changes ahead, such as the deprecation of their legacy authentication protocols.

These authentication protocols do not support modern authentication mechanisms like multi-factor authentication, which means that enabling MFA won't suffice.

Protocl method columns - Each of these protocols can be blocked using mailbox services settings, authentication policy, and transport config this column's details which methods are in place to block these protocols.

Reviewing the report and cross referencing it with the PowerShell script results will help you to have a better picture of legacy protocols in use, lowering the possibility of missing services or users that still have basic authentication protocols in play.

Go to the Office Admin center -> Settings -> Org Settings -> Modern authentication and uncheck all of the basic authentication protocols.

From the discovery of the legacy authentication protocols opened and used by users and business processes to blocking access and implementing and managing the exclusions, security teams need to dive in, remediate and manage every problematic use of the authentication protocol.

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