These logs will indicate which users are still depending on legacy authentication and which applications are using legacy protocols to make authentication requests. The Client App column or the Client App field under the Basic Info tab after selecting an individual row of data will indicate which legacy authentication protocol was used. Clicking on each individual sign-in attempt will show you additional details. If you have activated the new sign-in activity reports preview, repeat the above steps also on the User sign-ins (non-interactive) tab.įiltering will only show you successful sign-in attempts that were made by the selected legacy authentication protocols.Expand your date range if necessary using the Date filter.Filter by Client App > check all the Legacy Authentication Clients options presented.Add the Client App column if it is not shown by clicking on Columns > Client App.Navigate to the Azure portal > Azure Active Directory > Sign-in logs.Azure AD sign-in logs can be used to understand if you're using legacy authentication. Identify legacy authentication useīefore you can block legacy authentication in your directory, you need to first understand if your users have apps that use legacy authentication and how it affects your overall directory. The best way to protect your account from malicious authentication requests made by legacy protocols is to block these attempts altogether. Even if you have an MFA policy enabled on your directory, a bad actor can authenticate using a legacy protocol and bypass MFA. Legacy authentication does not support multi-factor authentication (MFA). Today, the majority of all compromising sign-in attempts come from legacy authentication. Any client that uses legacy mail protocols such as IMAP/SMTP/POP3.
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Older Office clients that do not use modern authentication (for example, Office 2010 client).Legacy authentication is a term that refers to an authentication request made by: To give your users easy access to your cloud apps, Azure Active Directory (Azure AD) supports a broad variety of authentication protocols including legacy authentication.