I've just upgrade to firmware 8.3R7.1 and now i have this error when i test user authentication : === Test User Authentication === User authentication for user rrr4444 ...   [FAILED]     Returned error code : STATUS_LOGON_FAILURE     The attempted logon is invalid. This is either due to a bad username or authentication information.   All is green when i make the basic verification on my AD connection. User authentication doesn't work but user password change works fine!!!   I've restart AD services and reset join severail times.   Please help! Thanks ... View more