6.5.1

Table Of Contents
Types of Identity Sources
vCenter Server versions earlier than version 5.1 supported Active Directory and local operating system
users as user repositories. As a result, local operating system users were always able to authenticate to
the vCenter Server system. vCenter Server version 5.1 and version 5.5 uses vCenter Single Sign-On for
authentication. See the vSphere 5.1 documentation for a list of supported identity sources with vCenter
Single Sign-On 5.1. vCenter Single Sign-On 5.5 supports the following types of user repositories as
identity sources, but supports only one default identity source.
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Active Directory versions 2003 and later. Shown as Active Directory (Integrated Windows
Authentication) in the vSphere Web Client. vCenter Single Sign-On allows you to specify a single
Active Directory domain as an identity source. The domain can have child domains or be a forest root
domain. VMware KB article 2064250 discusses Microsoft Active Directory Trusts supported with
vCenter Single Sign-On.
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Active Directory over LDAP. vCenter Single Sign-On supports multiple Active Directory over LDAP
identity sources. This identity source type is included for compatibility with the vCenter Single Sign-
On service included with vSphere 5.1. Shown as Active Directory as an LDAP Server in the
vSphere Web Client.
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OpenLDAP versions 2.4 and later. vCenter Single Sign-On supports multiple OpenLDAP identity
sources. Shown as OpenLDAP in the vSphere Web Client.
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Local operating system users. Local operating system users are local to the operating system where
the vCenter Single Sign-On server is running. The local operating system identity source exists only
in basic vCenter Single Sign-On server deployments and is not available in deployments with multiple
vCenter Single Sign-On instances. Only one local operating system identity source is allowed. Shown
as localos in the vSphere Web Client.
Note Do not use local operating system users if the Platform Services Controller is on a different
machine than the vCenter Server system. Using local operating system users might make sense in
an embedded deployment but is not recommended.
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vCenter Single Sign-On system users. Exactly one system identity source is created when you install
vCenter Single Sign-On.
Note At any time, only one default domain exists. If a user from a non-default domain logs in, that user
must add the domain name (DOMAIN\user) to authenticate successfully.
vCenter Single Sign-On identity sources are managed by vCenter Single Sign-On administrator users.
You can add identity sources to a vCenter Single Sign-On server instance. Remote identity sources are
limited to Active Directory and OpenLDAP server implementations.
Platform Services Controller Administration
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