Access NAS shared folder as non-local user

Try user: Test@SERVER But what you really want to do is find an error in the logs and tell us that.

Test@SERVER brings the same error. There are no logs (at least on the server logging system) that mention anything about this. I did however do some more Google searching about the message in that access denied dialog box that contains: "Multiple connections to a server or shared resource by the same user, using more than one user name, are not allowed. Disconnect all previous connections to the server or shared resource and try again." I found https://support.microsoft.com/kb/938120 that addresses this issue. I am in fact already logged into a different shared folder on that NAS using a different name. It would appear that Windows is purposely keeping me from accessing my Test folder using the different Test user account by design.

My vote goes for what 6ATR said.

Yes, you can't connect to the same server with multiple credentials at once under Windows. However, you can trick it. For your second user's connection, you use a different way of naming the server. The easiest way is using the server's IP address instead of its name for the second connection. Like, instead of '\\SERVER\Test', connect to '\\10.0.0.7\Test' or whatever the right IP number is for your NAS. If you're running your own DNS you can add aliases for the server to have multiple names instead. It sometimes even works if for one connection you use the Netbios name alone, like 'server' , and for the second connection use the FQDN, like 'server.local', but that one is spotty in my experience. Good luck!