Thank you so much for posting here.
So sorry that we do not have Server 2008 in my test environment, so we could not do the test. Since we configured the auto-enrollment, could other server get the certificate?
As for the error: The requested certificate template is not supported by this CA, we could refer to the below article to check whether it helps.
Besides, we are not professional with the external CA, so sorry that we could not provided any information. It is suggested that we could contact the external CA to get more professional assistance.
Thank you so much for your understanding and support.
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