When installing an SSL certificate using Microsoft IIS 7.0 or 7.5 on Windows Server 2008 / 2008R2, the following error may occur:
This error occurs because IIS Manager performs a lookup operation to search for the friendly name of the certificate during installation. However, the code that performs this lookup operation misses this specific case, and it does not know how to retrieve the friendly name of a certificate in a PKCS#7 file. Therefore, the lookup operation fails, and the error message is displayed.
To resolve this problem, verify if the certificate was installed by performing the following steps:
Step 1: Create a Certificate snap-in within the MMC on the server
Step 2: Locate the SSL certificate
On the General tab, under the validity dates, there should be a key icon with the following message:
"You have a private key that corresponds to this certificate"
If this is present, close the certificate and the MMC and proceed to Step 3. If there is no reference to the private key, please refer to the instructions referenced at the following knowledge base solution, to restore the private key.
Step 3: Bind the SSL certificate to the appropriate web site in IIS