Hi... Well Dynamic Registration uses this stored procedure, you might want to twink it and run it as a separate script for some of your existing users. ALTER Procedure [dbo].[DynamicRegistration_ChangeLoginName] @p_OldName varchar(50), @p_NewName varchar(50) as Update dbo.Users set UserName=@p_NewName where UserName=@p_OldName Update aspnet_Users Set UserName=@p_NewName, LoweredUserName=Lower(@p_NewName) Where LoweredUserName=Lower(@p_OldName) |