Finder will not allow user to create folder on a network drive

Question

I have an 27-inch iMac (Late-2012) that I recently did a wipe of the HD and reloaded the OS. When I did the reload, I installed MacOS X 10.9.2 but have kept it up to date, so that it is currently running 10.9.4. The user of this computer connects to a server and authenticates with a separate username and password. He can connect, authenticate, and view everything on the server fine, however, when he tries to create a new folder in the primary folder that he works with, Finder will prompt him for an Administrator Password and, despite what he puts in, (The Mac Admin Username & Password, his Mac username & password, and the username & password he uses to authenticate to the server) it will return that he does not have permissions to create the folder. Now, he can copy folders in this same folder, he can rename them, he can delete them, and he can also drag and drop a folder into the folder all from within Finder. He is also able to create new folders on his Mac without Finder prompting for authentication. I thought that it could be the network account that he uses to connect to the server, however, he is able to ssh to the server, navigate to the folder and run the mkdir command and create a folder. I have did a permissions repair, which has not corrected the problem,  and I have even had him try being logged in under the Mac Administrator Account in which Finder prompted him for a password. I have also had him try to create a folder from another Mac on the network running the same version of MacOS, which he was able to do. I am at a loss. I cannot think of what it could be or anything else to try. Has anyone else encountered this problem before? Any help or thoughts are greatly appreciated.

Answer 1

Please read this whole message before doing anything.
This procedure is a test, not a solution. Don’t be disappointed when you find that nothing has changed after you complete it.
Step 1
The purpose of this step is to determine whether the problem is localized to your user account.
Enable guest logins* and log in as Guest. Don't use the Safari-only “Guest User” login created by “Find My Mac.”
While logged in as Guest, you won’t have access to any of your documents or settings. Applications will behave as if you were running them for the first time. Don’t be alarmed by this behavior; it’s normal. If you need any passwords or other personal data in order to complete the test, memorize, print, or write them down before you begin.
Test while logged in as Guest. Same problem?
After testing, log out of the guest account and, in your own account, disable it if you wish. Any files you created in the guest account will be deleted automatically when you log out of it.
*Note: If you’ve activated “Find My Mac” or FileVault, then you can’t enable the Guest account. The “Guest User” login created by “Find My Mac” is not the same. Create a new account in which to test, and delete it, including its home folder, after testing.
Step 2
The purpose of this step is to determine whether the problem is caused by third-party system modifications that load automatically at startup or login, by a peripheral device, by a font conflict, or by corruption of the file system or of certain system caches.
Please take this step regardless of the results of Step 1.
Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards, if applicable. Start up in safe mode and log in to the account with the problem. You must hold down the shift key twice: once when you turn on the computer, and again when you log in.
Note: If FileVault is enabled, or if a firmware password is set, or if the startup volume is a Fusion Drive or a software RAID, you can’t do this. Ask for further instructions.
Safe mode is much slower to start up and run than normal, with limited graphics performance, and some things won’t work at all, including sound output and Wi-Fi on certain models. The next normal startup may also be somewhat slow.
The login screen appears even if you usually log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
Test while in safe mode. Same problem?
After testing, restart as usual (not in safe mode) and verify that you still have the problem. Post the results of Steps 1 and 2.