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Ever since I started using Windows 11, automatic connections using credentials saved in an .rdp file have started failing with the error below.

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From this error, it appears that Credential Guard is blocking the use of stored credentials.

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From a quick investigation, Credential Guard seems to be enabled by default starting with Windows 11 22H2.

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Reference: Overview of Credential Guard | Microsoft Learn

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I could not determine in detail why Credential Guard blocks the use of credentials in this case, but the behavior described in the following document is likely involved.

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Devices that use 802.1x wireless or wired networks, RDP, or VPN connections that rely on insecure protocols with password-based authentication cannot use SSO to sign in, and are forced to manually reauthenticate for all new Windows sessions while Credential Guard is running.
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Reference: Considerations and known issues when using Credential Guard | Microsoft Learn

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This time, I looked into ways to avoid this reauthentication during RDP connections and perform remote access more smoothly, so I am summarizing them here.

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Contents

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Workaround 1: Use the Microsoft Store remote desktop app

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Apparently, this problem can be resolved by using the Microsoft Store version of the Remote Desktop app.

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When I actually tried it, using the Store version of Remote Desktop made it possible to automatically access the remote machine using credentials saved in the app.

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However, personally I do not like the Store app version of Remote Desktop because the scrolling behavior feels weird, so I decided not to adopt this method.

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Workaround 2: Register generic credentials with cmdkey

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The next workaround is to register generic credentials with cmdkey.

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Reference: cmdkey | Microsoft Learn

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If you save credentials in the traditional Remote Desktop client, those credentials are stored as Windows Credentials.

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By deleting those with cmdkey and re-registering them as Generic Credencials, it seems possible to avoid Credential Guard blocking during Remote Desktop and enable automatic logon.

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First, use the following command to check the currently registered credentials.

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cmdkey /list\n\n>\nTarget: Domain:target=TERMSRV/192.168.10.10\nType: Domain Password\nUser: kash1064\nLocal machine persistence
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Next, after deleting the existing credentials with the delete option, re-register the credentials as Generic Credencials.

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cmdkey /delete:TERMSRV/192.168.10.10\ncmdkey /generic:TERMSRV/192.168.10.10 /user:<UserName> /pass:<Password>
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Run the following command again to confirm that the credentials were registered, and then confirm that you can successfully perform remote access using the .rdp file.

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cmdkey /list\n\n>\nTarget: LegacyGeneric:target=TERMSRV/192.168.10.10\nType: Generic\nUser: kash1064
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Summary

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I do not know nearly enough about Windows credential management, so I could not dig deeply enough into why Credential Guard blocks the connection or why the workaround works. I would like to study authentication-related topics more as well.

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