I was having troubles with the Credential Manager of Windows 8.1 with a new Samba 4.1.x AD. Even after upgrading to Samba 4.2 this wasn't fixed. After clearing the BCKUPKEY_PREFERRED as mentioned here[1]. The Credential Manager was working again. I'd guess my stored key wasn't 2048-bit and my Windows declined it. It might be useful to include this in dbcheck, as suggested by Andrew[2], to make sure the stored key has the correct size or regenerate it in case of failure. Regards, Marc [1] https://lists.samba.org/archive/samba/2014-November/187205.html [2] https://bugzilla.samba.org/show_bug.cgi?id=11097
*** Bug 11546 has been marked as a duplicate of this bug. ***