By default, schools are connected to default Sub-Domain. You can connect your own Custom Root Domain. This article goes over the basic steps for connecting a custom root domain to your school.
Step1: With a click, select the website to which you want to connect your Domain.
Step2: As soon as you select the school, a toolbar will appear at the left corner of your screen. Select 'MANAGE' ------>'DOMAINS'
Step3: Here you will get the sub-domain you entered while creating your School and this sub-domain will be your default primary sub-domain. In case you want to add other sub-domains, click on 'New Domains', enter the sub-domain name and click 'ADD DOMAIN'
SUB- DOMAIN SETTINGS
If you want to delete any domain, mark it as primary, edit its name or redirect it to the primary domain, refer to the gif below.