In the 6.0 release, Site Recovery Manager interacts with both vCenter Server (as before) and Platform Services Controller (PSC).

The PSC contains a Lookup Service to locate other services, a Licensing Service to replace the VIM license manager, and Single Sign On (SSO) service for authentication and token acquisition.

The vCenter Server management node contains a new Tag Manager to create categories and tags for Storage DRS or SPBM, and a new Authz service to replace the VIM authorization manager.

Figure 1. Management (M) and PSC (N) nodes
Management (M) and PSC (N) nodes graphic

When programs connect to the local or remote SRM server, they must obtain a SAML token from the SSO service on the local or remote PSC. (The older login functions implicitly obtain a SAML token.)