User creation method The method the instance uses to create users can be upgraded to use the full email address by activating the Email Automatic User Creation plugin. The plugin makes the following changes: Sets the property glide.email.create_userid_from_email to true. Increases the width of the User ID [sys_user.user_name] column to accommodate email addresses. After activating the plugin, enable automatic user creation from email . Warning: Review your existing user records to reconcile any that contain identical email addresses. If you activate the plugin prior to reconciling email addresses, your instance cannot distinguish between users with identical email addresses and will randomly select one of the users with the matching email address.