brotherton-erpnext/erpnext/docs/user/manual/en/setting-up/articles/rename-user.md

#Rename User

Renaming functionality allows you to edit id of specific record. User is saved with person's email id. Only User with System Manager's role will be able to rename User IDs.

Following are the steps to rename user id.

Step 1: Users

Setup > Users > User

Open User to be renamed.

Step 2: Rename

From Menu, select Rename.

Step 3: Update

Enter valid email id and click on Rename.

After successful renaming, User will be able login using updated user id.