I created a TrialTenant under Entra ID center and I received a Primary domain to join into my Active Directory. However this URL does not solve to anything (DNS).

I want to use SSSD/realm/PAM to join my Linux server into my Microsoft Entra ID, but when I try, I get:

[root@ ~]# realm join TrialTenantXXXXXXXXX.onmicrosoft.com
realm: No such realm found
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My license:
License Microsoft Entra ID Free

I am not azure / ad expert, I am just to try to integrate my Linux with Entra ID.

I can do that for traditional instances like Active Directory and Samba 4 AD without problems. So I feel that something is missing under my Entra ID, or maybe is my license.