403 Insufficient Privileges, documentation understates required permissions #3624

Describe the bug

New-MgBetaDomainFederationConfiguration returns 403 Insufficient Privileges in GCC High when using the documented minimum permissions (Domain Name Administrator role + Domain.ReadWrite.All scope). The operation only succeeds after elevating to Hybrid Identity Administrator + User Administrator + Domain Name Administrator roles AND connecting with Domain.ReadWrite.All, Directory.ReadWrite.All, User.ReadWrite.All, and Directory.AccessAsUser.All scopes. The API documentation does not reflect these additional requirements.

Expected behavior

Per the API documentation (https://learn.microsoft.com/en-us/graph/api/domain-post-federationconfiguration), Domain Name Administrator role + Domain.ReadWrite.All scope should be sufficient. The additional roles and scopes required in GCC High are undocumented.

How to reproduce

1. Activate Domain Name Administrator via PIM (docs state this is least privileged role).
2. Connect with Connect-MgGraph -Scopes "Domain.ReadWrite.All" -Environment USGov.
3. Run:

   $kpoFed = Get-MgBetaDomainFederationConfiguration -DomainId "kpo.amazon"
   New-MgBetaDomainFederationConfiguration -DomainId "leo.amazon" `
       -DisplayName $kpoFed.DisplayName `
       -IssuerUri $kpoFed.IssuerUri `
       -ActiveSignInUri $kpoFed.ActiveSignInUri `
       -PassiveSignInUri $kpoFed.PassiveSignInUri `
       -SignOutUri $kpoFed.SignOutUri `
       -PreferredAuthenticationProtocol $kpoFed.PreferredAuthenticationProtocol `
       -FederatedIdpMfaBehavior $kpoFed.FederatedIdpMfaBehavior `
       -IsSignedAuthenticationRequestRequired `
       -SigningCertificate $kpoFed.SigningCertificate `
       -NextSigningCertificate $kpoFed.NextSigningCertificate

SDK Version

2.37.0

Latest version known to work for scenario above?

N/A

Known Workarounds

Only succeeded after elevating to all three roles:

• Hybrid Identity Administrator
• User Administrator
• Domain Name Administrator

AND connecting with expanded scopes:

Connect-MgGraph -Scopes "Domain.ReadWrite.All","Directory.ReadWrite.All","User.ReadWrite.All","Directory.AccessAsUser.All" -Environment USGov

Debug output

</details>


### Configuration

N/A

### Other information

N/A