This has since been changed to the second half of 2021, but when it does happen, if the application attempting to authenticate does not support the modern authentication protocols, you will not be able to authenticate. Of these, POP3, IMAP, and Remote PowerShell will all get OAuth support. ![]() This means the apps and services themselves are not trusted to handle credentials your (hopefully) trusted authority like Azure AD deals with the credentials and issues a token.īasic authentication for the protocols EWS, EAS, POP3, IMAP4, and Remote PowerShell was set to be disabled on 13 October 2020. When you use modern authentication, your users authenticate interactively with a web dialogue that belongs to your identity provider (Azure AD), rather than a dialogue the OS (Windows) or application (Outlook, Thunderbird) itself owns. In the context of Microsoft 365 and Azure Active Directory, which handles Microsoft 365’s authentication, these are protocols such as ADAL and OAuth. ![]() Protocols that support MFA are described as modern authentication. The term legacy authentication doesn’t refer to one particular protocol, but rather any that do not support Multi-Factor Authentication (MFA). ![]() Security Defaults are a group of best-practice security settings, and one of note is the disablement of all legacy authentication, which itself has been off in Exchange Online and SharePoint Online, by default, since August 2017. Since October 2019, Microsoft has enabled Security Defaults by default in new Microsoft 365 tenants.
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