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Domain AD Authentication Keeps Dropping

Posted: Thu Nov 28, 2019 6:41 am
by MadHatter21
I have set up a Folder share so that MAC Users can have a folder to store all their data, we gave them an AD account to authenticate however once every three to four weeks I need to rejoin the QNAP to the domain as it seems to loose the connection to the domain controller

even if I use a Windows PC and try to connect to the folder share using a test AD account it still fails to connect to the folder that is shared and give an authentication error

I have checked the Logs and can't see anything that is stopping connection
as soon as I go through the quick setup to join the QNAP to the domain for Authenticated AD users it works again.

QNAP TS-431X2 - Firmware Version
Windows Server 2012 R2 (Primary Domain Controller)

Any help or suggestions would be appreciated, TIA