After running VDT against a vCenter Server, a "Duplicates Found" failure is presented.
[FAIL] VCENTER-FQDN (VC Server or CGW)
[FAIL] Duplicates Found (activedirectory / cs.registry) Ignore if this is the PSC HA VIP. Otherwise, you must unregister the extra endpoints.
In the example above, 2 services are detected to be duplicated: activedirectory / cs.registry. It is possible to see others as well.
vCenter Server 7.x
vCenter Server 8.x
vCenter Server 9.0
Duplicate services can be removed and resolved by leveraging the lsdoctor tool. This tool can be downloaded from KB320837.