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First off, I am not a sysadmin, so feel free to correct any mistakes in my question.

We have a Windows Server 2008 R2 domain with 802.1X authenticated wireless access for laptops with Windows 7 installed. Most of the laptops are in the domain, but some are not. The people using those machines do have a domain user account to access network resources, but are not logged on to the machine with that account.

How can we allow the windows 7 machines that are not in the domain to connect to the wireless network?

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up vote 3 down vote accepted

Under advanced network properties of that SSID untick "use logged on user's credentials to connect to this network" and then you will get a prompt for the username and password or a balloon tip to say additional information required. Click on it and type domain\username and then the password. Thats it!

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actually, on windows 7 it's a bit more complex: in advanced settings, choose 'user authentication'. Click on 'Settings' for PEAP, click on 'configure' for EAP-MSCHAPv2 and uncheck 'automatically use my windows logon name and password (and domain if any)'. But still, this was the right approach, so thanks! – stombeur Dec 14 '11 at 14:05

The Windows wireless client would not let you use arbitrary credentials for PEAP-MSCHAPv2. But you could set up a new WLAN to use PEAP-TLS with certificates instead of password-based MSCHAPv2 authentification. Certificates can be used on non-domain machines as well with only minor limitations. See the technet docs for details on how to set this up.

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The Windows wireless client would not let you use arbitrary credentials - apparently this is outdated / has changed. Try rabbid's solution instead - seems easier than setting up a CA and an additional wireless network. – the-wabbit Dec 14 '11 at 10:36

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