Symptoms: Witness license shows the usage is greater than the capacity using the embedded license. (Oversubscribed vSAN witness license).
==Example picture:
Environment
VMware vSAN 6.x VMware vSAN 7.0.x
Cause
This happens if more than one witness appliance of the same version is deployed in vCenter
The witness licenses are embedded and part of the OVF/OVA template the witness is deployed from.
Oversubscription is expected for this license, however should work without issue.
Resolution
This is expected behavior and can be safely ignored for versions below 7.0U1. 7.0U1 and higher can use a feature called shared witness, only for 2-node clusters. More information on this can be found at the below links.