Read the article to know more about error message “An error occurred while accessing this resource” in Azure Virtual Desktop. Bobcares, as a part of our Server Management Service offers solutions to every query that comes our way.

Overview

1. Knowing “An error occurred while accessing this resource” in Azure Virtual Desktop
2. What are the Error Impacts?
3. Causes & Fixes
4. Prevention Steps
5. Conclusion

Knowing “An error occurred while accessing this resource” in Azure Virtual Desktop

When we see the message “An error occurred while accessing this resource” in Azure Virtual Desktop (AVD), it usually means that there are problems with the resource availability or setup. Misconfigurations, network problems, or authorization difficulties are a few possible causes of this.

Typically, the issue indicates that the application virtual machines (AVD clients) or application groups cannot be accessed by the AVD client during a session. Depending on the context, this error’s phrasing may change significantly, but it typically contains words like “unable to access,” “no resources available,” or “authentication failed.”

What are the Error Impacts?

This error may have the following effects:

• Unable to Access Resources: Users are unable to establish a connection with their virtual desktops or programs.

• Decreased Productivity: Interruptions to workflows impair user productivity.

• A rise in support requests could mean that IT teams receive more requests for troubleshooting.

Causes & Fixes

1. Missing Azure Virtual Desktop Agent

Users may not be able to access their virtual desktops because the virtual machine (VM) may not have the Azure Virtual Desktop Agent and Boot Loader loaded.

Fix:

i. Go to the VM’s Control Panel.

ii. Select Programs > Programs and Features from the menu.

iii. Search the list of installed programs for the Azure Virtual Desktop Agent and Boot Loader.

iv. Make sure they are current if they are there. Go to the following step if they are absent.

v. Connect as an administrator to PowerShell.

vi. The Azure Virtual Desktop Agent can be installed by using the following command:

Install-Module -Name Az.DesktopVirtualization

vii. Once installed, use the following to register the virtual machine (VM) with a host pool:

New-AzWvdSessionHost -ResourceGroupName "YourResourceGroup" -HostPoolName "YourHostPool" -Name "YourVMName"

viii. Verify the virtual machine’s configuration and operation.

2. Incorrect Permissions

Insufficient permissions prevent the user account from accessing Azure Virtual Desktop resources.

Fix:

i. Open the Azure Portal and log in.

ii. Go to Users in Azure Active Directory.

iii. Choose the user who is having problems, then look up the roles they were given.

iv. Give the user at least Contributor permissions on the applicable Azure subscription or resource group if they don’t already have them.

v. Click Access Control (IAM) after selecting the subscription by going to Subscriptions.

vi. Select the role of Contributor by clicking on Add role assignment, then assign it to the user.

3. MFA Requirements

If Multi-Factor Authentication (MFA) settings are not established correctly, users may not be able to log in.

Fix:

i. Access > Policies.

ii. Review existing policies to check if MFA is enforced for the AVD user group.

iii. If needed, create or modify a policy:

• Click New Policy and name it (e.g., “AVD MFA Required”).

• Under Assignments, select the user group needing MFA.

• In Access Controls, enable Require multi-factor authentication.

iv. Ensure users complete their MFA setup in their Azure AD security settings.

4. Session Host Configuration Issues

Connectivity problems could arise from incorrect setup or activation of the session host with the host pool.

Fix:

i. Open PowerShell and run:

Get-AzWvdSessionHost -ResourceGroupName "YourResourceGroup" -HostPoolName "YourHostPool"

ii. Verify that the session host appears in the list and is in a healthy state.

iii. If issues are found, re-register by removing it from the host pool:

Remove-AzWvdSessionHost -ResourceGroupName "YourResourceGroup" -HostPoolName "YourHostPool" -Name "YourVMName"

iv. Then add it back using:

New-AzWvdSessionHost -ResourceGroupName "YourResourceGroup" -HostPoolName "YourHostPool" -Name "YourVMName"

5. Network Connectivity Problems

Problems with network connectivity may restrict users’ ability to access AVD resources and log in.

Fix:

i. Verify that no firewall rules are preventing communication between Azure services and client devices.

ii. Check to see if the ports needed for RDP (usually TCP port 3389) are open on any network firewalls as well as local firewalls.

iii. To verify connectivity to Azure endpoints from a client computer, use programs like tracert or ping.

iv. We must also assure consumers that they can use Azure services without any disruptions and that their internet connections are reliable.

Prevention Steps

To stop this error from happening again in the future:

• Verify network setups, agent installs, and permissions on a regular basis.

• For proactive AVD environment monitoring, make use of Log Analytics and Azure Monitor.

• Make sure all users are instructed on correct login practices and informed about security measures such as multi-factor authentication.

[Searching solution for a different question? We’re happy to help.]

Conclusion

The error message “An error occurred while accessing this resource” in Azure Virtual Desktop usually points to resource availability or configuration issues, such as misconfigurations, network problems, or permission errors. These issues can prevent users from accessing virtual desktops or applications, impacting productivity. To fix the error, check for missing agents, incorrect permissions, MFA settings, session host configurations, and network connectivity. Regular audits, proactive monitoring, and user training can help prevent future occurrences.