Accessing Outlook API with Python

Question

How do you access the XML API with Python to create calendar events in a Microsoft Office 365 account?

I have a hosted account on http://outlook.office365.com, and I'm trying to use the Python library https://github.com/linkedin/pyexchange (using the sample code almost verbatim) to create calendar events, but Outlook refuses my credentials with the error, "Unable to connect to Exchange: HTTP Error 401: Unauthorized"

I'm using the endpoint https://outlook.office365.com/EWS/Exchange.asmx, with the username and password I normally use to login to the web UI.

Do I need to specially setup or configure my account before I can access it from the API?

xrt xrt · Accepted Answer · 2019-10-24T08:21:54

Your outlook probably does not use NTLM Authentication anymore. (Sources: here, here and here)

I faced the same issue after our accounts were migrated from on-prem to O365 and had to use another library to access the calendar on exchange. I used the O365 library here: https://pypi.org/project/O365

Follow the docs to create an register and authenticate your application in Azure, then you should be able to access your calendar as before with the sample code below:

from O365 import Account
from datetime import datetime
credentials = ('your_client_id', 'client_secret')

scopes = ['https://outlook.office365.com/Calendars.Read']
account = Account(credentials)

schedule = account.schedule()
calendar = schedule.get_default_calendar()

q = calendar.new_query('start').greater_equal(datetime(2019, 5, 20))
q.chain('and').on_attribute('end').less_equal(datetime(2019, 10, 24))

events = calendar.get_events(query=q, include_recurring=True)

for event in events:
    print(event.subject)

Accessing Outlook API with Python

2 Answers