Configure Global User Settings
To apply user-related options in your Oro application instance:
Navigate to System > Configuration in the main menu.
Click System Configuration > General Setup > User Settings.
Under Email Settings, configure the following:
Case-Insensitive Email Addresses — If this option is enabled, the letter case is ignored when comparing email addresses. For example, john.doe@example.com and John.Doe@example.com are treated equally. By default, the option is disabled. Be noted that the setting is only applied to back-office users. The identical option for customer users is managed here.
Allow Sharing — If this option is enabled, users are allowed to share entities in the Oro application back-office. This option is available in the Enterprise Edition only.