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Microsoft Edge has native support for PRT-based SSO, and you don't need an extension. This option saves them the trouble of reentering their credentials to access their work websites and increases their productivity. On some platforms, you can configure Microsoft Edge to automatically sign into websites for your users. Restrict sign-in to a trusted set of accounts.Ensure that users always have a work profile on Microsoft Edge.If you want to manage browser sign-in, you can use the following policies: If the user doesn't get automatically signed into Microsoft Edge, they can manually sign into Microsoft Edge during the first run experience, browser settings, or by opening the identity flyout.
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But, if the OS default account is MSA, Microsoft Edge will sign in automatically with the MSA account. This scenario is unlikely on enterprise devices.
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Microsoft Edge uses the OS default account to auto sign into the browser. How users can sign into Microsoft Edge Automatic sign-in The following table summarizes the feature support for each type of account. The type of account used for sign-in determines which authenticated features are available for the user in Microsoft Edge. Microsoft Edge supports signing into a browser profile with an Azure AD, MSA, or a domain account. Browser sign-in and authenticated features This applies to Microsoft Edge version 77 or later.
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