When you try to configure the integration between
the VMware NSX Manager and the vCenter Lookup Service you get the following
error Initialization of STS Clients failed. Root Cause: The SSL certificate
of STS service cannot be verified.
This is more of a work around than anything else,
if you backup a stage and return to the pane where you configure the Lookup
Service, if you change it to port 443, click OK and accept the
certificate warning it then works correctly.
I always thought that the VMware Lookup Service
operated over port 7444, not the typical HTTPS port of 443. The
following VMware article supports this theory upto vSphere version 5.5.
Although it does not seem to have been updated for vSphere 6. It would appear
the port for the Lookup Service is now 443.
Using port 443 it integrates with the
Lookup Service without problem.