How to use $expand while making microsoft API call?

Question

I am trying to get all servicePrincipals for a tenant using this API call, I want to expand it to get ServicePrincipals role assignment, I am using the following GET request but I am not getting the required response.

https://graph.microsoft.com/v1.0/servicePrincipals/?$expand

How do I check which all fields the API can return using expand?

This is the API link
https://learn.microsoft.com/en-us/graph/api/serviceprincipal-list?view=graph-rest-1.0&tabs=http

Answer 1

You need to specify the property to expand on. Here's an example for your scenario:

https://graph.microsoft.com/beta/servicePrincipals?$top=999&$filter=tags/any(t:t eq 'WindowsAzureActiveDirectoryIntegratedApp')&$expand=appRoleAssignments