Im in the same boat since last week...
I can't connect sandbox Ads via API (Forbidden https://login.windows-ppe.net/)
Until last Friday I was able to access my Sandbox MsAds account via API (in python).
Now it fails because I need to refresh the credentials and I can't access the login page (it returns a 403 Forbidden):
The Python library gives me this URL:
https://login.windows-ppe.net/consumers/oauth2/v2.0/authorize?client_id=...&scope=https://api.ads.microsoft.com/msads.manage%20offline_access&response_type=code&redirect_uri=....&prompt=login
It gives me a direct error 403, so I can't continue. Should I change something?
I'm using the following library:
Name: bingads
Version: 13.0.14
Thanks in advance!
EDIT: For your information. We think that windows-ppe has been deprecated so we updated the library and tried to use an "outlook" account (instead of an "outlook-int" account), but we still haven't managed to authenticate properly (see replies to Julian Selser's comments).