We've got a customer with an SSL certificate that expired and we tried to renew it. Everything works with the CSR request, but when we get the certificate back via email from our SSL provider, it won't import the certificate. Currently, I've manually imported the certificate (using the certificates add-in in MMC) and have attached the proper certificate (meaning it has the new expiration date) to the Default Website (the one that contains /exchange). However, it's not working. Anyone have some ideas I can try? I've disabled the "default" Rapid SSL certificate and imported the certificate authority that they sent. We're stuck and the customer can't get email via smart phones or web.