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When I run a simple powershell command on a remote PC such as

Get-WmiObject Win32_Process -computer Pc1

Some Pcs reply "Access denied", while other reply fine, but I can't get the difference.

Which rights are involved?

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4 Answers 4

Have you looked at this ServerFault question Which permissions/rights does a user need to have WMI access on remote machines?

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Disable windows firewall first, to see if it's that simple; if so, you can narrow it down to individual ports.

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I'd be very surprised if this was a firewall issue. The fact that some machines acquiesce, and others have the gaul to respond with a "Access denied" means the traffic is getting through to the target, and a response is getting back. –  Izzy Jul 1 '09 at 16:37
    
Reason I mentioned it is that I once inherited a network where half the users had the firewall enabled, the other half didn't. I actually received access denied errors from the (WMI based) network monitoring software, which really wasn't what I expected, either. –  Kara Marfia Jul 1 '09 at 17:14
    
Fair comment, I guess it pays it expect the unexpected! –  Izzy Jul 3 '09 at 2:33

You need to be a local admin on the target PC, and you need to be using those credentials.

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Non admins should be able to run PowerShell WMI queries if the WMI Control permissions are adjusted to allow access.

My research found the following... See KB 325353 and http://msdn.microsoft.com/en-us/library/aa393613(VS.85).aspx

On the target server: Computer Management | WMI Control | Security Tab Highlight Root\cimv2 node Click Security button For EVERYONE group, check Remote Enable box or add a group and grant Remote Enable and Enable Account.

I have not had a chance to test these settings yet. Pls verify on NON-PRODUCTION server first.

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It is interesting, but unfortunately does not solve the problem. –  sthiers Jul 15 '09 at 15:30

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