You can register your email domain in the auto discovery service in to make it easier for end users to access their apps portal through the Workspace ONE application. End users enter their email address instead of the organization's URL.
When the email domain of the organization is registered for auto discovery, end users enter only their email address in the sign-in page to access their apps portal. For example, they enter firstname.lastname@example.org.
When auto discovery is not used, the first time that end users open the Workspace One application, they must provide the complete organization URL. For example, they enter myco.vmwareidentity.com.