HP SUM Error - Unable to login or identify node as a supported device

[InternalISE]

I am running HP SUM 7.5.1 on CentoOS 7.

I can add Nodes for iLO and VMware and update firmware with no issues.

When I add a Windows Node I get an error on the initial inventory -

Unable to login or identify node as a supported device.

Unable to identify node as a supported node type. Please ensure that node is supported, reachable on the network and credentials are correct.

Credentials are correct and Windows Security log confirms that the authentication was successful.

Any ideas?  I have scoured google and tried countless variations of the configuartion.

Thanks in advance.