I am running a QNAP TS-1279U in my work place. I hosts our VM servers and also hosts the folder shares for my colleagues with the company. All the file sharing is controlled by Windows AD, this has been running perfectly up to the release of firmware 3.7. It is causing me nothing but problems by dropping the permissions it's permissions for certain users for certain folders, usually my MD which is not good!!! I can refresh the permissions within the QNAP User Interface and access is the granted again for the user but only for a short amount of time.
I have noticed that Windows ACL is now an option since the release of 3.7 but I have kept this switched off because I prefer controlling the permission on the QNAP UI.
I have tried to regress the firmware through the QNAP UI to 3.6.1 but it will not allow me to do this.