The message in screen 1 is telling you that the name on the certificate does not match the url you are using in the pulse connection. Certificates are issued to the specific url and the same url has to be used in pulse for the connection to elimiate this error. Selecting that link should allow you to open and inspect the certificate itself and you can see what name the certificate was issued to. If the name on the certificate is setup in your organizations DNS entries then you can use this instead of the url getting the error in pulse.
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