I'm trying to apply a certificate to the Data Collector Manager for Enterprise Manager 2015 R3. I create the correct files using a .PEM for the public and a .PFX for the private key.

I used OpenSSL to create the .pfx file with the below parameters:

openssl pkcs12 -export -out mylittlepfx.pfx -inkey key.pem -in cert.cer -name delldata

From what I read on an OpenSSL website is -name is creating the alias. But when I add all the correct files, password and alias. I receive an error:

Error registering certificate on Data Collector.  Verify certificate and key are in a supported format.