We're connecting to Active Directory via LDAPS, and sometime within the past few weeks the above logfile begain spinning until finally our vcenter went yellow for log space utilization. All the log entries are substantially in the form:
2019-03-07T23:48:58.061441+00:00 warning vmdird t@140142492772096: No SD found for cn=DSE Root
Haven't made any changes to AD schema or SSO config on vsphere. Searching Google I find a few people asking about this, but nobody answering. So, what gives?