3.1.2.4.2.3 Encoding Certificate Template Identifier in the Request
Clients MUST identify certificate template to the server in one of the following ways:
The certificate template name as specified in section 3.1.2.4.2.2.1.8.
The certificate template OID as specified in section 3.1.2.4.2.2.2.3.
The certificate template name (value of the Certificate.Template.cn datum) as an Enrollment-Name-Value pair as specified in section 3.1.1.4.7.
The certificate template name (value of the Certificate.Template.cn datum) in the pwszAttributes parameter of ICertRequestD::Request or ICertRequestD2::Request2 as specified in section 3.2.1.4.3.1.