Azure AD synchronization fails with: “user_realm_discovery_failed: User realm discovery failed” and “The remote server returned an error: (407) Proxy Authentication Required.”
June 19, 2018
Problem You’ve noticed that your Azure AD synchronization has stopped synchronizing for a period of time: Launching the Synchronization Service Manager indicates the export job is failing with stopped-extension-dll-exception: Reviewing the event logs show the following three events consistently logged: Event ID: 6900 Event ID:
