Yes, you can update the extension number for a user. Just follow the steps mentioned below:

1. Login to your MyOperator panel.

2. Click on “Manage” at the top.

3. Go settings and click on “Users”. A list of all your existing users will appear.

4. Choose the user whose extension number you want to update. Click on “Edit” corresponding to the chosen user’s name.

5. Click on "Extension" and enter the extension number.

6. Click on “Save”.