Referencing https://docs.microsoft.com/en-us/graph/api/site-list-permissions?view=graph-rest-1.0&tabs=http, I'm trying to list permissions on a SharePoint site. The site in question does not inherit permissions from its parent.
I'm able to get the site using GET https://graph.microsoft.com/v1.0/sites/{site-id} and see the results. I'm also able to see other relationships, e.g. /lists, /sites, etc, to see other information.
When I try to list the permissions using GET https://graph.microsoft.com/v1.0/sites/{site-id}/permissions per the documentation link above, I get 400 - Bad Request response saying operation not supported.
I'm using the composite site id (host name, site collection guid, site guid) for all calls.
Any assistance is greatly appreciated.