`POST` operation not allowed for `https://graph.microsoft.com/v1.0/admin/serviceAnnouncement/healthOverviews`

[MartinM85]

Open API specification defines POST operation for https://graph.microsoft.com/v1.0/admin/serviceAnnouncement/healthOverviews endpoint but

POST https://graph.microsoft.com/v1.0/admin/serviceAnnouncement/healthOverviews

returns the code 405