The user does not exist or is not unique. › Forums › General discussion › The user does not exist or is not unique. This topic contains 1 reply, has 2 voices, and was last updated by Alexander Bautz 2 months, 2 weeks ago. Author Posts July 3, 2019 at 09:30 #25936 MYHParticipant Hi Alex, i am trying to figure out how to solve this problem. on a form developed by dffs when i click on save button this message appear “The user does not exist or is not unique.” any idea!!? July 3, 2019 at 11:00 #25939 Alexander BautzKeymaster If you are setting a people picker field with the title / display name of a user you might need to user the login name to ensure it is unique. Alexander Author Posts You must be logged in to reply to this topic.