I'm trying to connect Windows 7 machine to my wireless network secured with WPA2-Enterprise PEAP. PEAP uses server authentication so I have created root CA named FesbCA on my Windows server 2008 R2 and with it I signed root.fesb.hr certificate which is used for server authentication.

On Windows 7 client machine root CA FesbCA is imported to Trusted Root Certification Authorities and that should make root.fesb.hr valid certificate.

Than why do I still get the certificate error when trying to connect to wireless network?

Here is reference image with error.

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Does the NPS server (root) have FesbCA's certificate in its store as well? BTW, I think some are being misled by the names of your servers. Typically, in a PKI the root is the self-signed root CA. In this case, root.fesb.hr is simply a RADIUS box and FesbCA is the root CA correct? – Paul Ackerman Feb 6 at 13:20
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Export the root certificate from the CA (FesbCA) and import it to the Trusted Root Certification Authority store

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I did that, notice the second paragraph: "On Windows 7 client machine root CA FesbCA is imported to Trusted Root Certification Authorities and that should make root.fesb.hr valid certificate." – Ivan Maček Jan 9 at 15:15
In the current user store or in the computer account store? If you open up the Certificates mmc snap-in for "My Account" and find the root.fesb.hr certificate, and double click it, what does it state under the "Details" tab? Can it locate the chain in its entirety? – Mathias R. Jessen Jan 9 at 21:02
There isn't root.fesb.hr there is only FesbCA My User Account certification store. Certification chain is: FesbCA -> root.fesb.hr. – Ivan Maček Jan 10 at 0:32
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