Session Host on Another tenant than the Azure AD users

Hi Team,

I have 2 Azure AD Tenants.
1st where my Azure Subscription is hosted
2nd where my Azure AD Connect syncs the user

Since WVD was available i was able to deploy session host servers in the subscription and pointed the authentication using service principal (which i had created manually on another tenant )

Above scenario works fine and to confirm if this is supported i had raise Support ticket as well and MS support confirmed the same.

Until Management portal. I cannot point my authentication of management portal to another tenant ID as the current template just takes the service principal name and password and it doesn't ask us about the tenant ID. it just deploys fine but when i click on the management portal url in app service

I get below error when i open the page