Edit user data from the databaseAccess Databases dynamic options
From general settings

Or from the dropdown in the main view

Open the dynamic options database module, the user type

Expand the database you want to edit

Find the option and click it

Edit the fields that need it

Save the changes
This will update the data for all incidents where that user is used, making sure your data is consistent across the whole platform.
You can add new users to the same database without uploading another Excel file