If you manage multiple Intune tenants with your Azure AD account (invited as guest in the foreign tenant) we need a way to specify the tenant id we want to connect. Otherwise you will land in your home-tenant every time. This posts shows you how to accomplish that with the Intune PowerShell SDK.
If we have a look at the default Graph settings in a PowerShell session with the Intune PowerShell SDK you will notice that all authentication requests will land on the /common endpoint.
To connect to a specific tenant we need to update the AuthUrl to contain the tenant id or any registered domain name of the target tenant before connecting:
Afterewards you can connect to Microsoft Graph as usual: