Getting error reading non-admin users tasks, email and notes using admin token

Question

We have been using graphApis to read all users todo tasks,email and notes using the admin token, seeing below errors while reading mailbox items since last week

Tasks: 

Status Code: 400
{
    "error": {
        "code": "invalidRequest",
        "message": "Invalid request",
        "innerError": {
            "code": "ErrorIncorrectRoutingHint",
            "date": "2025-02-19T17:52:18",
            "request-id": "d6ab2ab5-44bb-4d09-9fcf-a9bb34fcc277",
            "client-request-id": "83dbb4f8-1947-8989-f16b-504beb401f5a"
        }
    }
}

EndPoint: 
			
Emails/messages:

Statuscode: 403

{
    "error": {
        "code": "ErrorAccessDenied",
        "message": "Access is denied. Check credentials and try again."
    }
}

EndPoint: 

Can you confirm something changed recently?

Do we need any additional permissions required to access other users tasks, emails and notes?