I have configured a PIX506E to use certificates from a Microsoft CA for a site-to-site VPN. Gernerating RSA keys, either General or Usage, work. Authenticating the CA and enrolling the PIX with the CA have no problems. I save the certificates and write the configuration to memory. VPN works without any problems. However after enrolling with the CA, connectivity to the PIX Device Manager (PDM) is lost. If I zeroize the RSA keys, I regain connectivity to the PDM, but loose the VPN!
Both the PIX and PDM are the latest software releases the PIX 506E support.