Issue Summary

CUSI's transparent and effective client communication is a top priority, and we are committed to providing you with regular updates regarding CUSI products.

CUSI wanted to inform users that Microsoft has updated their status page to reflect this outage. According to Microsoft's status page, this incident is:

"Active – Connectivity Issues Affecting Azure Services in West US

We are investigating an issue affecting connectivity to Azure services for a subset of customers in the West US region. Impacted customers may experience intermittent issues when accessing Azure services. We will provide more information as it becomes available."

This message was last updated at 15:50 UTC on 23 July 2026

• CUSI Status Page: https://status.cusi.com 
• Microsoft Azure Status: https://azure.status.microsoft/en-us/status 

CUSI's transparent and effective client communication is a top priority, and we are committed to providing you with regular updates regarding CUSI products.

CUSI wanted to inform users that Microsoft has updated their status page to reflect the current status regarding the outage. According to Microsoft's status page, this incident is:

"Starting at 14:44 UTC on 23 July, 2026, customers may have experienced intermittent connectivity failures, increased latency, or difficulty accessing Azure services in West US region. Customers with traffic traversing the West US region may also experience downstream impact. Impacted services include, but are not limited to:

API Management, Application Gateway, Azure Database for PostgreSQL, Azure Kubernetes Service (AKS), ExpressRoute Circuits, ExpressRoute Gateways, Network Infrastructure, Power BI Embedded, Virtual WAN, VPN Gateway

We have identified a potential trigger and are isolating certain impacted devices and redirecting portions of traffic to healthier devices as part of a mitigation plan. We are actively monitoring traffic patterns and service recovery. We will continue to evaluate the effectiveness of mitigation, assess customer impact, and investigate contributing factors. We will provide additional information as soon as it becomes available. 

This message was last updated at 17:08 UTC on 23 July 2026"

• CUSI Status Page: https://status.cusi.com 
• Microsoft Azure Status: https://azure.status.microsoft/en-us/status 

CUSI's transparent and effective client communication is a top priority, and we are committed to providing you with regular updates regarding CUSI products.

CUSI wanted to inform users that we have been closely monitoring Microsoft's status page and they have identified a recent change that was strongly correlated with the onset of impact. They have also completed the rollback of this change and telemetry across services are continuing to show signs of recovery. CUSI customers should be observing recovery at this time.

• CUSI Status Page: https://status.cusi.com 
• Microsoft Azure Status: https://azure.status.microsoft/en-us/status 

CUSI is announcing that the tasks executed related to the Virtual Desktop Infrastructure (VDI) environments have successfully addressed the issues as of 1:20pm CST.

Details of the Issue:

• Issue Start Time: 7/23/26 at 9:44 am CST

• Duration: 3 hours 36 minutes

• Affected Services:

  • Virtual Desktop Infrastructure (VDI) Environments

What Happened:

Microsoft identified a recent change that was strongly correlated with the onset of impact.

Resolution Steps:

• Action Taken:

• • Microsoft has completed the rollback of this change and telemetry across services.

• Verification: After applying the fixes, CUSI thoroughly tested the services to ensure they function as expected.

Current Status:

As of now, all affected services are fully operational. Application users should experience normal performance and functionality.

Next Steps:

• CUSI will continue to monitor the services closely to ensure stability.

• If you encounter any issues, please report them to our support team at techsupport@cusi.com

Thank You:

CUSI sincerely apologizes for any inconvenience this outage may have caused and appreciate your understanding and patience. Your satisfaction is important to us.

Issue Summary

Summary

The previously reported service disruption impacting Virtual Desktop Infrastructure (VDI) environments hosted in Azure East US has been resolved. Microsoft has confirmed full service restoration across all availability zones.

Root Cause

A faulty deployment to a regional Azure control plane backend service introduced a regression that caused provisioning, scaling, and update operations to fail. The issue initially surfaced in one availability zone and spread to the remaining two as Microsoft's rollback progressed. Microsoft resolved the incident by rolling back all three availability zones to the last known good state.

Resolution Timeline

• 11:39 UTC, 24 Apr – Customer impact began
• 11:59 UTC, 24 Apr – Microsoft detected the issue and began investigation
• 14:30–14:40 UTC, 24 Apr – Root cause identified; rollback initiated across affected zones
• 19:02–23:22 UTC, 24 Apr – Rollback completed across all three availability zones
• 00:15 UTC, 25 Apr – Full service restoration confirmed; incident closed

Next Steps

Microsoft will publish a Preliminary Post Incident Review (PIR) within approximately 72 hours, followed by a Final Post Incident Review within 14 days. Our team will review findings once available and continue monitoring the environment.

Resources

• CUSI Status Page: https://status.cusi.com
• Microsoft Azure Status: https://azure.status.microsoft/en-us/status

CUSI apologizes for the disruption and thank you for your patience.