Add vCD connection to vRealize Business

Getting an error when attempting to add a vCD connection to vRB.

"Could not connect to the vCloud Director with the specified credentials."

I'm able to connect to the vCD web portal with the same user/pw.

Connection details:

vCD - https://vcd.domain.com/cloud/org/MyORG

user - username

pw - Password

Am I doing something wrong here?  I can use the same creds as an Endpoint in vRA.  No proxy needed to connect.

BigD