The vCenter SSO authenticates a user in an identity source (configured in the vCenter SSO). Identity Sources define how and where to verify user credentials, for this reason, are a possible authentication backend, and vSphere supports the following:
- Active Directory (native): When the PSC is joined to an AD domain, it is possible to use the domain or the forest as an authentication source
- LDAP (Active Directory): If you don't want to join the PSC to the AD domain, or if you are using a lightweight active directory
- LDAP (OpenLDAP): If you have an open source based LDAP server (such as OpenLDAP)
- Local OS: The user defined in the SAM (for a Windows-based PSC) or the /etc/passwd and /etc/shadow file (for a Linux-based ...