That’s the nature of software development now… Constant change.
]]>As the article says, the only client supported by modern authentication is Outlook for Windows. Microsoft is working to support other clients using the method described here. Their announcement also says that OWA supports “claims-based authentication with ADFS, which is a form of modern authentication.”
]]>Historically, Exchange Server on-premises customers have not been terrific at upgrading servers or clients. If Microsoft said that they would provide a patch for (say) Outlook 2016, would customers upgrade? By using the subscription version, the patch is in the mainline builds and customers who use the subscription model will get it automatically. But the subscription version of Outlook is only the first client. Microsoft has already committed to delivering an update for the LTSC version and other platforms (Mac, mobile). As to Windows 11, I guess they want to move people to the latest desktop OS. I think they should have supported Windows 10 too, but I don’t get to vote.
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