You can change the existing username when you are giving the account to a different user. However, the new username will affect the following.
The following will be reflected with the new username
- Username displayed on MiiTel Phone
- Username displayed in the aggregation results of the user
- Username in the call history list (MiiTel won't reflect the new username in the new Call History List's past call histories)
- Username in the CSV file that is created in storage (MiiTel won't reflect the new username in the CSV file that was created before the name change)