I have problem in my network to map a share of a NAS. My network has composed of

Question

I have problem in my network to map a share of a NAS.

My network has composed of this server:
-) windows 2003 sp2 domain controller
-) windows 2003 sp2
-) windows 2008 sp1
-) windows 2008 R2
-) NAS (no in active directory)

I have created a .cmd script with a net use command. I have linked this file in a GPO user/logon so when all admin user logon in a server can access in a shared dir with file.
the file have this command:
net use w: /delete /yes
net use w: aswindows <password> /user:<user>

I have used a user to map a share because this NAS is outside of a AD.

when I logon in windows 2003 server or 2008 sp1, network drive has mapped regularly, and I can read and write inside.
when I logon in windows 2008 R2, network drive hasn't mapped. I see it in explorer with a red cross over!!! if I try to open, windows popup open with: "An error occurred while reconnecting W: to aswindows. Microsoft windows network: 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. This connection has not been restored."

why win2008r2 do this?
what differences exist from win2008 sp1 e win2008 r2?

thanks of all

Explanation / Answer

You need modify in local security policy these keys:
Local Policy/Security Options:

Now when you logon in server you will connect w: without problem.

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