For Essbase Servers, you can continue to use Essbase native authentication if you want to continue managing users and groups as you did in previous releases. In Essbase native security mode, you continue to manage users through Administration Services Console. You can continue to create native and external users as you did before.
Essbase Server and Essbase Administration Server can both run in Essbase native security mode. You do not need to install and configure Shared Services if both of the following are true:
Essbase and Administration Services are the only EPM System products you are installing.
You want Essbase Server and Essbase Administration Server to continue running in Essbase native security mode and you do not plan to use external authentication in native security mode.
Essbase Administration Server can run in EPM System security mode with Essbase Server running in Essbase native security mode. The same rules apply to Provider Services servers.
If any Essbase Server that you administer from Administration Services Console runs in EPM System security mode, Essbase Administration Server must also run in EPM System security mode. You cannot use a combination of EPM System security mode and Essbase native security mode to manage users on an Essbase Server. You must choose one mode for managing all Essbase users on an Essbase Server.