In the ever-evolving landscape of cloud solutions, Azure Virtual Desktop (AVD) has emerged as a powerful tool for remote access and collaboration. However, like any technology, occasional hiccups may occur. This blog post aims to provide a concise guide to troubleshoot common issues and address disconnection challenges in Azure AVD.

The following steps underline some procedures for resolving Azure Virtual Desktop (AVD) problems:

1. Verify VM Status: 

  Ensure your Virtual Machine (VM) is in a running state. 

2. NIC Configuration Check: 

   Double-check Network Interface Card (NIC) configurations for potential issues. 

3. Network Security Group (NSG) Inspection: 

   Investigate if traffic is blocked by NSG, examining both inbound and outbound ports. 

4. Run Command Responses: 

   Check responses from the Run command for insights into system status. 

5. Serial Console Utilization: 

  Use the serial console if additional troubleshooting is necessary. 

6. Consider Redeployment: 

  Explore VM redeployment on another Azure node for a fresh start. 

Note: Redeploy will not re-image a VM, instead will reboot the VM on a different node on Azure.

Azure Virtual Desktop (AVD) Disconnection – Proactive Approach to avoid Issues 

Proactive strategies are crucial in avoiding issues related to Azure AVD disconnection. These strategies aim to prevent problems before they occur, ensuring a smooth and uninterrupted workflow. It highlights the importance of employing preventive measures rather than reactive solutions to keep the AVD system functioning without disruption. 

Here are some of the steps worth considering: 

1. Keep Software Updated: 

  Regularly update AVD clients to the latest version of Windows available. 

2. Implement sweeping whitelists for all Microsoft Azure related services:

 Use URL checker on the deployed session hosts to verify if it can reach all the servers it is needed to. 

3. Scheduled Reboots: 

 Schedule daily reboots to maintain system stability. 

4. FSLogix Maintenance: 

 Keep FSLogix up to date to address potential compatibility issues. 

5. Network Optimization: 

 Encourage users to utilize 5GHz home networks over 2.4GHz for enhanced performance. 

AVD Run Command Options: 

The Run Command employs a virtual machine (VM) agent to execute scripts inside a Windows or Linux VM in Azure. These scripts can be used for various purposes like application management or general machine upkeep. They are effective in diagnosing and troubleshooting VM access and network concerns swiftly, ensuring the VM returns to its optimal state. 

Here are some Run commands that should be examined during Azure Virtual Desktop (AVD) troubleshooting: 

• RDPSettings: Verify Remote Desktop Protocol (RDP) Listener Settings. 

• ResetRDPCert: Restore RDP Authentication mode to defaults. 

• SetRDPPort: Customize the Remote Desktop port for specific requirements.

Azure Virtual Desktop (AVD) Remote Desktop Services Status: 

The status of AVD remote desktop services pertains to the current operational condition of the AVD’s remote desktop features. It provides insight into whether these services are functioning optimally, experiencing issues, or undergoing maintenance.  

Here are some of the AVD services that should be checked: 

• RdAgent: Running 

• Remote Desktop Configuration: Running 

• Remote Desktop Services: Running 

 Inspect and adjust other services as needed. 

Azure Virtual Desktop (AVD) URLs for Outbound Traffic: 

The URLs utilized for outbound network communication must be accessible for the functioning of AVD. These URLs are critical in managing and regulating the data traffic leaving the virtual desktop, ensuring efficient and secure connections. 

• Verify accessibility to critical URLs for smooth service functionality. 

Refer https://learn.microsoft.com/en-us/azure/virtual-desktop/required-fqdn-endpoint?tabs=azure for a comprehensive list of required FQDNs and endpoints needed for Azure Virtual Desktop (AVD).

• Utilize the Required URL Check tool for validation and troubleshooting. 

Conclusion:

Empower yourself with these step-by-step guidelines to navigate Azure Virtual Desktop (AVD) troubleshooting and conquer disconnection challenges. Your seamless remote desktop experience is just a few diagnostics away! 

Feel free to share your thoughts and experiences in the comments. Happy troubleshooting! 

Author: Prabhat, is a seasoned IT professional, boasting over a decade of experience in the field of Operations and Infrastructure Support. His expertise spans across Azure Cloud and Windows on-prem platforms. A fervent enthusiast of Azure, he backs up his passion with a wealth of knowledge underlined by multiple Azure certifications. 

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