/product-groups/translation_management/tms/b/sdl-tms-120---product-updates/posts/sdl-tms-12-0-crq-9846-unable-to-edit-a-user-without-changing-the-username-to-a-valid-e-mail-addressSymptoms: After upgrading to SDL TMS 12.0, it is no longer possible to edit a user without being forced to change the username to a valid email address. Explanation: This feature was implemented by design to help users migrate to the new SDL ID singleen-USTelligent Community 12 Non-Production