In the License Management Single Sign On configuration, Authorized Domains are fetched from registered teams in Organization. To change domain, organization/team admin should follow this:
Navigate to Admins and Teams page.
Select the team that you want to edit, by clicking on the gear icon on the right-hand side of the screen.
Click on the pencil icon next to Domain 1 field on your team Domain.
Change the name of the domain and click Change Domain to apply changes.
Navigate to Single Sign On(SSO) menu and click on Refetch, to sync the changes with Single Sign On Configuration
Click Save button to apply changes to Single Sign On Configuration