Forum Discussion
503 UnknownError for all /sites calls
Every call I make to one of the /sites/ endpoints gives me a 503 UnknownError response. The prime example of this is the inability to do a GET request to /sites/root. I have ensured that my API has a...
I've run into scenarios where 503 was indeed caused by throttling, but that should go away in time. The easiest way to confirm whether it's throttling related is to run a test with a new AppID, preferably from a different tenant.
FWIW, the endpoint does work as expected here, but that's no guarantee that a service-side issue is happening somewhere in the vast MS cloud. Support is provided for the Graph API as well, so tell the agent you worked with to stop slacking and transfer you to the corresponding team. These forums are not an official support channel and there's barely any presence from Microsoft folks on them, outside of the blog section.