fenderTech: March 2021

Friday, March 26, 2021

Using Exchangelib to test EWS + oAUth2

Exchangelib is a Pyhton library where you can develop Python script that need to interact with Exchange. One of the use case for me is to develop a test script to troubleshoot connection to Office 365 using EWS + oAuth2

The script below will need the following information and you will also need to register your application with Microsoft Azure.

Tenant ID, Client ID, Client Secret: After your app is registered successfully, these information can be obtained from Azure.

Primary SMTP Address: Your email address that use for this integration

Exchange Web Service URL: This guide help you to identify your URL

The script will have debug mode enabled so you can see all the information when the script is run. It will print out total item in your inbox and also send out a test email.

from exchangelib import Configuration, OAuth2Credentials, OAuth2AuthorizationCodeCredentials, Identity, OAUTH2, Account, Message, Mailbox
from oauthlib.oauth2 import OAuth2Token
import logging
# This handler will pretty-print and syntax highlight the request and response
# XML documents
from exchangelib.util import PrettyXmlHandler

logging.basicConfig(level=logging.DEBUG, handlers=[PrettyXmlHandler()])

credentials = OAuth2Credentials(
  client_id='bdb7ef22-****-4e05-bef8-8bd6f77fe321', client_secret='***********************', tenant_id='a3c8f93g-126b-****-a360-8741a8983b07', identity=Identity(primary_smtp_address='test@dummy.dum')
)

config = Configuration(service_endpoint='https://{yourdomain or office 365 url}/ews/exchange.asmx', credentials=credentials, auth_type='OAuth 2.0')

a = Account(primary_smtp_address='test@dummy.dum', config=config, autodiscover=False)

print(a.inbox.total_count)

m = Message(
    account=a,
    folder=a.sent,
    subject='Daily motivation',
    body='All bodies are beautiful',
    to_recipients=[Mailbox(email_address='recipient@dummy.dum')]
)
m.send_and_save()

a.protocol.close()