Summary
On 23 July 2026, customers accessing the AP Essentials US environment (us.readsoftonline.com) experienced login failures and errors loading the application, over a period of approximately three hours.
Root Cause
The interruption was caused by a broader Microsoft Azure outage affecting the West US region, where part of the AP Essentials US environment is hosted. During this outage, network traffic entering and exiting the region was disrupted, which prevented the application from loading correctly and caused login attempts to fail. The issue was external to the AP Essentials application itself. Microsoft has published its own incident review of this event, available on the Azure status history page (https://azure.status.microsoft/en-us/status/history/, Tracking ID: ZJV6-SGG).
Resolution
Once Microsoft restored connectivity to the affected region, access to AP Essentials US returned to normal. Our teams monitored the recovery and confirmed that login and application functionality were fully restored for all customers before closing the incident.