Application not configured as a multi-tenant

[pkoevesdi]

I try to authenticate with this simple script:

from O365 import Account
credentials = ('#############', '###############')

account = Account(credentials)
if account.authenticate(scopes=['basic', 'message_all']):
   print('Authenticated!')

I get printed:

Visit the following url to give consent:
https://login.microsoftonline.com/common/oauth2/v2.0/authorize?response_type=code&client_id=#####....
Paste the authenticated url here:

When I visit this URL, I get the following error code: AADSTS50194: Application '#############' is not configured as a multi-tenant application. Usage of the /common endpoint is not supported for such applications created after '10/15/2018'. Use a tenant-specific endpoint or configure the application to be multi-tenant.

What do I have to set inside MS 365 to make this work?

[pkoevesdi]

Ok, if I change the line to

account = Account(credentials, tenant_id='organizations')

or my tenant ID instead of organizations, I get a URL of type https://login.microsoftonline.com/organizations/oauth2/v2.0/authorize, and a different error message: AADSTS500113: No reply address is registered for the application. This is probably a different issue, I'll close this here.

Background: I thought I used the auth_flow_type=='authorization', but probably I was on auth_flow_type=='credentials', which doesn't allow the default tenant common.

[pkoevesdi]

Btw.: the resulting account.connection object indeed shows _auth_flow_type = 'authorization'.