Global Settings for All SSO

The settings on the SSO General tab apply to all configured SSO implementations.

Fastpath: Admin Console > People > Settings > Single Sign On > General
Enable Username Confirmation for New Users, Enable Email Confirmation for New Users
These settings define the behavior for new users when they first log in. When they're selected, users will be asked to confirm that they want to use the relevant value (username, email, or name) that is provided by the Identity Provider. They can also change these values if they wish. By default, these settings are all disabled, since in most cases the intended result is for users to be forced to use the username, email, and name defined for them in the corporate directory. The Enable Name Confirmation setting has an additional application when users typically log in with either a single-word username or an email address, but may need the option to provide a first/last name combination. If you select this check box, users can also modify those profile fields after initial login.
Note: These fields also apply to any users who may be logging into your community using External ID.
Allow Federated Users to Change Name
Use this setting if you want federated users to be able to change their names in the profile settings and have the change propagated to the IdP.
External Identity is Case-Sensitive
Use this setting to determine whether the value used for the external identity should be case-sensitive. You should disable this setting in a case where the external identity value changes under different circumstances, for example when it's sometimes all lowercase and sometimes all uppercase.