Microsoft Graph API calls from Python

If you are looking for a simple demo that creating a mail draft for a certain Azure AD user, try the code below:

import adal
import json
import requests

tenant = '<your tenant name or id>'
app_id = '<your azure ad app id>'
app_password = '<your azure ad app secret>'
userAccount = '<user account you want to create mail draft>'

resource_URL ='https://graph.microsoft.com'
authority_url = 'https://login.microsoftonline.com/%s'%(tenant)

context = adal.AuthenticationContext(authority_url)

token = context.acquire_token_with_client_credentials(
    resource_URL,
    app_id,
    app_password)

request_headers = {'Authorization': 'bearer %s'%(token['accessToken'])}

create_message_URL =resource_URL + '/v1.0/users/%s/messages'%(userAccount)

message_obj = {
    "subject":"Did you see last night's game?",
    "importance":"Low",
    "body":{
        "contentType":"HTML",
        "content":"They were <b>awesome</b>!"
    },
    "toRecipients":[
        {
            "emailAddress":{
                "address":"AdeleV@contoso.onmicrosoft.com"
            }
        }
    ]
}

result = requests.post(create_message_URL, json = message_obj,headers = request_headers)

print(result.text)

Result:

Note: please make sure that your Azure AD application has been granted with the application Mail.ReadWrite permission

Let me know if you have any further questions.