Hello, @yazin !
It sounds like you are trying to get your school recognized as an educational institution so that students can sign up for a free Azure student account using your school during the registration process. This is different than adding a custom domain name (which you'd want to tag as Azure AD). Is this correct?
The process for getting a school officially recognized as an educational institution is outside the scope of Azure service and product questions. Unfortunately I'm unfamiliar with the process and my initial round of research wasn't terribly productive although I'll share it here in case it helps:
- http://www.edugeek.net/forums/office-software/210908-office-365-a1-plus-licensing-3.html
- https://learn.microsoft.com/en-us/microsoft-365/education/deploy/create-your-office-365-tenant
Similar questions:
- https://learn.microsoft.com/en-us/answers/questions/409775/azure-your-email-domain-is-not-registered-with-us.html
- https://learn.microsoft.com/en-us/answers/questions/503067/how-do-i-register-a-school39s-domain-name-for-azur.html
- https://learn.microsoft.com/en-us/answers/questions/200710/what-can-i-do-to-register-my-school-domain-with-az.html