exchangelib.errors.TransportError: Failed to get auth type from service

[bjs94]

I'm trying to connect to outlook and read email. I'm using an automated company email to fetch the inbox. If I include auth_type it gives credential errors even though the credentials are correct. This account doesn't prompt any authentication like 2-factor or anything although my company has it, so I removed authentication auth_type under config for this. This is my code,

from exchangelib import DELEGATE, Account, Credentials, Configuration
credentials = Credentials(
    username='john@example.com',
    password='topsecret'
)
ews_url = 'https://outlook.office365.com/owa/company.org/EWS/Exchange.asmx'
primary_smtp_address = 'john@example.com'

config = Configuration(service_endpoint=ews_url, credentials=credentials)

account = Account(
    primary_smtp_address=primary_smtp_address,
    config=config,
    autodiscover=False,
    access_type=DELEGATE
)

for item in account.inbox.all().order_by('-datetime_received')[:10]:
    print(item.subject, item.sender, item.datetime_received)

This is the error I get,

Failed to create cached protocol with key ('https://outlook.office365.com/owa/company.org/EWS/Exchange.asmx', Credentials(''john@example.com', 'topsecret')): Failed to get auth type from service
Traceback (most recent call last):
  File "C:/mycode.py", line 28, in <module>
    account = Account(
  File "C:\Python\Python38\lib\site-packages\exchangelib\account.py", line 126, in __init__
    self.protocol = Protocol(config=config)
  File "C:\Python\Python38\lib\site-packages\exchangelib\protocol.py", line 411, in __call__
    raise e
  File "C:Python\Python38\lib\site-packages\exchangelib\protocol.py", line 406, in __call__
    protocol = super().__call__(*args, **kwargs)
  File "C:Python\Python38\lib\site-packages\exchangelib\protocol.py", line 452, in __init__
    self.config.auth_type = self.get_auth_type()
  File "C:\Python\Python38\lib\site-packages\exchangelib\protocol.py", line 457, in get_auth_type
    auth_type, api_version_hint = get_service_authtype(
  File "C:\Python\Python38\lib\site-packages\exchangelib\transport.py", line 165, in get_service_authtype
    raise TransportError('Failed to get auth type from service')
exchangelib.errors.TransportError: Failed to get auth type from service

Please help me, I've been trying for days and couldn't figure this out.

[ecederstrand]

Your EWS URL value looks wrong. exchangelib cannot use OWA to connect. I suggest you use server='outlook.office365.com' instead.

[kurisutofu]

The issue is fixed, thank you for this lib!

How did you fix the issue? I'm seeing the same in my code.

Nevermind ... the version of python was not correct. After moving to 3.8, the error disappeared.

[ernekyan]

Hi, i am on Python 3.9 and the issue is still here =)

[ecederstrand]

@ernekyan Which issue are you referring to?

This question is more than two years old. I think it's better to open a new question with the detauls of your issue.

[ernekyan]

@ecederstrand thank for response, i have Transport error , exchangelib 4.7.2, after 2-3 running

File "C:\Program Files\Python39\lib\site-packages\exchangelib\transport.py", line 173, in get_service_authtype 
    raise TransportError(str(e)) from e 
exchangelib.errors.TransportError: ('Connection aborted.', ConnectionResetError(10054, 'An existing connection was forcibly closed by the remote host', None, 10054, None))

copy my code in another file and it work 2-3 times and again
i think something wrong with session, but i already use account.protocol.close() and have no idea
should i open a new question?

[ecederstrand]

@ernekyan That's your server or network connection randomly aborting connections. Not related to any of the above issues. If you want to handle those errors gracefully, set up a retry policy as described in the documentation.