Can’t change permissions – “The parameter is incorrect”

I don't know if this has been resolved somewhere else...

I spent the whole freakin day researching this problem.. I found a solution that worked for me so I want to share it to save people time... It's a great product but the support for this problem is bad from the threads i've seen - even seeing the admin locking the thread because users were frustrated.

I'm using AD with a ReadyNas 2100. I'm setting up Department Folders (which means alot of different variations of permissions per folder)...

(i'm doing this from memory - but get the main idea) What I did was to go to the root folder --> get to the Security Tab and remove the Domain User account. Click Advanced and then remove the Domain User account from that screen... --> Check "Replace permissions entries on all child objects with entries shown here that apply to child objects." It will warn you but go ahead anyways.. If this works then I believe it will reset all the subfolders Domain User account permission. Click Apply....(There are 3 opportunities (screens) to click Apply during this process - i think you do it last, but try to click it before the last window if it doesn't work) My un-educated guess is that there are conflicts with the Domain User permissions on the subfolders that is preventing you to save the configurations on the Root.

The drawback is that you have to go back and verify all the folders' permissions (to be sure) and add Domain Users when needed.

I'm not a guru or anything, but I think the Linux file permissions are conflicting with Windows. I have a problem giving users Write permission without assigning Full Control with the NAS.. Anytime I click Write permission, it ends up giving the FULL Control permission - hence, i think it's the OS's permission conflicts behind this whole mess... Hope I helped.....