I am testing to migrate EEPC to 6.x using migratinon tool. My environment include EEPC 4.x and 5.x, and I do not use any connector in it. When I use the tool to export the machine group, it is successfully. But for user group, it show error message "Object Not Found"and cannot export. Even I only choose only a user which his machine is using EEPC 5.x to export, it still fail and show the same error message. May I know what is the root cause?