Unable send a file sharing invitation via graph api with expirationDateTime present

Question

Hey,
Sending the following request via graph explorer results to (400) invalid request.

POST https://graph.microsoft.com/v1.0/drive/items/{item-id}/invite  
    {  
        "recipients": [  
            {  
                "email": "EmilyB@M365B154026.OnMicrosoft.com"  
            }  
        ],  
        "message": "Here's the file that we're collaborating on.",  
        "requireSignIn": true,  
        "sendInvitation": true,  
        "roles": [  
            "read"  
        ],  
        "expirationDateTime": "2021-07-15T14:00:00.000Z"  
    }  

However, when I remove the expirationDateTime property, the request works.
What is the correct format for expirationDateTime? I am unable to make a successful request with various formats.

The documentation states the type is DateTimeOffset(see here) while the graph metadata states that the type should be string(screemshot below).

Answer 1

As far as I know, the API does not currently support the expirationDateTime parameter, and similar questions have been raised before.