Getting 403 Forbidden migrating to Microsoft Graph Security alerts_v2 API on M365 Business Premium

Hello Community,

We are currently in the process of updating our security integrations to use the Microsoft Graph Security alerts_v2 API (`GET /security/alerts_v2`). However, our application is encountering an HTTP 403 Forbidden error upon making the request. 

We are running on a Microsoft 365 Business Premium license. Can someone help what we are doing wrong here?

{
    "error": {
        "code": "Unauthorized",
        "message": "Unauthorized request - Account Mode is not Active. MTP status: Suspended, MDE account mode: Deleted.",
        "innerError": {
            "date": "2026-10-14T13:40:24",
            "request-id": "a4c67215-a827-4793-8664-ffd78335fa55",
            "client-request-id": "a4c67215-a827-4793-8664-ffd78335fa55"
        }
    }
}