By default, the certificate that installed with Exchange Server 2010 is self-signed.
To trust this certificate, the root certification authority for the given certificate must be present in the certificate store for this computer.
For more information about how to manually add certificates to the local certificate store, see the Help file for the Certificate Manager snap-in in the Microsoft Management Console (MMC).
unless you are running into the initial problem that most older hardware had. You may need to do a firmware upgrade on your device that is connecting to the router. Firstly you can not use WPA, you can use WPA-PSK/WPA2-PSK or WEP.
Secondly you can change the SSID to what you want, and the channel to 1 or 11.
All certificates that are used for TLS must contain a Server Authentication object identifier (also known as OID).
If you're trying to use a certificate for TLS that doesn't contain a Server Authentication OID in the Enhanced Key Usage Field, you must create a new certificate.Then if your operating system is windowsxp please follow the attachment to have a try.(they sent me a file attachment with the email) If your operating system is vista please refer to id=214 I have also seen WPA - Enterprise as just WPA.This topic explains how to resolve certificate validation errors or refers to documentation that may help you resolve the errors.For more information about how the Microsoft Exchange Transport service selects certificates for Transport Layer Security (TLS), see the following topics: This error is an informational status message.This status message indicates that the revocation server for the certificate could not be reached.