DNN: You must specify a non-autogenerated machine key to store passwords in the encrypted format.
In a DNN site I was experiencing odd behavior on one the projects I was trying to get working properly. I could not logon to the host account. I would return the error "You must specify a non-autogenerated machine key to store passwords in the encrypted format.". The fix was that it needs the original machine key section in the web.config. The validation key and the decryption keys are in a hex format string 1-0, and A-Z. I replaced the original content with placeholders "mKey" and "dKey" since I do not want to make public my keys... Look for soemthing like this <machineKey validationKey="mKey" decryptionKey="dKey" decryption="3DES" validation="SHA1" /> This post explains in more detail : http://kx.cloudingenium.com/programming/net/you-must-specify-a-non-autogenerated-machine-key-to-store-passwords-in-the-encrypted-format-either-specify-a-different-passwordformat-or-change-the-machinekey-configuration-