Possible issues with duplicate email addresses in [sys_user] tableDetailsBy default, <email> field in [sys_user] table is not set to be unique. This allows assignment of same email address to multiple users. Such duplication of email addresses is not a valid practice and can cause unpredictable behaviour(s) in the system. Hence, it is highly recommended to use unique email address for each user when possible. Some of possible issues that can occur from duplication of email address(es): Erratic behaviour of inbound email action(s) as Email Reader scheduled job uses first matched email address which is not guaranteed to be same every time if there are duplicate email addressesImpact on outbound notifications as multiple users will have same email address in [cmn_notif_device] tableWhen the email address is defined as {nameID}, it can impact user logins if SSO has been configured on the instance