Windows auto licensing with KMS is not working

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Hello,

We configured our windows images with KMS to enable activation of openstack Windows instances. We have also set the following value in cloudbase.init conf for automatic windows activation.

activate_windows = true

But auto activation is not working for the new instances. We get the following error message in logs:

Error 0xc004f074. No key management service could be contacted

We are able to ping the KMS host from the instance but connection to port 1688 is not working. We tried with allowing the port 1688 in openstack Security rules, enable/disable Windows firewall but still no luck with windows activation.

If you could provide some assistance on this, that would be great.

Thanks, Alex James.