It appears that that the location and VM size APIs do not currently support the AAD based authentication. The certificate is required. Rather than re-introduce the cert for just this limited UI scenario, I have decided to hard-code the list based on the returned info from current Azure. This is a decent short term solution, since a move to the 1.0.0 API (when released) will require that this code be changed anyway and presumably this problem should be fixed for good at that point.
It appears that that the location and VM size APIs do not currently support the AAD based authentication. The certificate is required. Rather than re-introduce the cert for just this limited UI scenario, I have decided to hard-code the list based on the returned info from current Azure. This is a decent short term solution, since a move to the 1.0.0 API (when released) will require that this code be changed anyway and presumably this problem should be fixed for good at that point.
/cc @HuanhuanSunMSFT