Symptoms:
When attempting to make CA changes in the UI, specifically to remove current Certificate Authority the changes do not commit
Internal API does not apply via UI endpoint
Workaround:
GET /v1/certificate-authorities to get list of all CA.DELETE /v1/certificate-authorities /[ID] -- replace [ID] with the ID of the MS CA found running the get APICertificates APIs | VMware Cloud Foundation API - Reference
Issue is addressed in VCF 5.x