for 2 years now my QNAP NAS 869 was a member of my UCS Domain. Some times (less then 1 time a month) i got a message from the NAS “Domain join failed” but all things worked as expected. A month ago i did a firmware Update and restarted the UCS and the NAS. One or two days later the users can’t access their folders on the NAS and the Domain failure message become permanet. So tried to leave the domain and re join. Ping from QNAP to UCS is possible and the time settings are the same. But i can’t join again. I deleted the nas in the UCS Domain but this can’t help to join again. After that i wrote to the QNAP Support. After sending my dumpfile from the QNAP to the supporter i got the answer “sorry no samba/linux AD is supported” - ticked closed.
Can you tell me how to search for any hints to fix this issue?