The vCenter APIs used to list or report information on users and groups are not supported by federated identity sources. These APIs include, but are not limited to, GroupChecker and PrincipalDiscovery.
For example, this means that the powershell cmdlet Get-VIAccount cannot function with federated identity sources in VCF 9.0.
vCenter 9.0 with a federated identity source.
This configuration was typically used to support legacy user/group enumeration via PowerCLI or API calls. This is no longer supported.
Instead of calling vCenter APIs to obtain user and group information from the federation provider, call the federation provider directly.
ADFS
Okta
Azure EntraID
For more information, see the documentation for your federation provider.