Microsoft

AADSTS90033 — Microsoft Online Directory Service unavailable

Directory backend service is unavailable.

Riposte solution

Azure AD's directory service is unavailable (likely a transient outage). Any authentication or token request at this moment will fail. Your application should catch this error and implement a retry later. For example, wait and retry the OAuth flow via Riposte after some minutes. Also monitor Azure status if this persists.

Quick facts

Provider: Microsoft
Endpoint / surface: Azure AD
Status code: 503

Why it happens

[Service outage; Connectivity issues]

How to fix it

[Retry later; monitor service health]