After joining Windows 10 (1511) to a Samba domain, domain users are unable to sign in to the Microsoft store. It just fails with an unspecific error. This not only affects the store app, but also the user profile settings (where you connect your local account to your Microsoft account). Even Visual Studio 2015 hangs with a white dialog when trying to log in. Any connection to a Microsoft account seems to be impossible.

A related issue is that the RDP client takes an unusual long time to start, but when its there, it works fine.

How can I fix this?

  • Are you encountering the error code 0x80090345 when you launch Windows Credential Manager by chance?
    – Ramhound
    Dec 30 '15 at 19:14
  • To test this, I set ProtectionPolicy to 0, but the Credential Manager seems to work fine. I didn't try to start it before I applied the work-around, so I can't tell whether it was initially broken. But that code seems familiar, I'd bet that this is the code Windows Live Mail 2012 showed me when trying to add new accounts. Dec 30 '15 at 19:27

Open the registry editor (regedit.exe), navigate to HKEY_LOCAL_MACHINE\Software\Microsoft\Cryptography\Protect\Providers\df9d8cd0-1501-11d1-8c7a-00c04fc297eb and add a new DWORD subkey ProtectionPolicy with the value 1. I have no idea why this works, so more elaborate explanations are welcome.


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