How to Fix: Remote Desktop certificate error, but certificate is OK
Certificate error with self-signed certificate and trusted CA.
📋 Table of Contents
The error 'Remote Desktop certificate error, but certificate is OK' affects users who connect to their remote computers over a VPN using RDP. This issue can be frustrating because it prevents users from establishing a secure connection to their remote computer.
Fortunately, the problem lies in the way Windows handles self-signed certificates for RDP connections. By following these steps, you should be able to resolve the issue and connect to your remote computer without any certificate-related warnings.
⚠️ Common Causes
- The primary reason for this error is that Windows by default does not trust self-signed certificates issued by a custom Certificate Authority (CA). This is because self-signed certificates are not signed by a trusted root CA. To resolve this, you need to add the custom CA to the list of trusted CAs on your local machine.
- An alternative reason for this error could be that the certificate is not correctly configured or is invalid in some way. However, since you have confirmed that the certificate is OK and you are using a trusted CA, this option can be ruled out.
🔧 Proven Troubleshooting Steps
Adding the custom CA to the list of trusted CAs
- Step 1: Open the Start menu and search for 'Control Panel'. Click on 'Control Panel' to open it.
- Step 2: Click on 'System and Security' and then click on 'Manage another account'. Then, click on 'Users' and then 'Add a user'. If you are not logged in as an administrator, you may need to restart your computer and log in as an administrator before proceeding.
- Step 3: In the 'Add a user' window, click on 'Add computer' and select the remote computer. Click 'Next' and then click 'Finish'. This will add the certificate to the list of trusted CAs on your local machine.
Configuring the RDP connection to use the custom CA
- Step 1: Open the Start menu and search for 'Remote Desktop Connection Manager'. Click on 'Remote Desktop Connection Manager' to open it.
- Step 2: In the Remote Desktop Connection Manager, click on 'Connect' and then select the remote computer. In the 'Connection Properties' window, click on 'Advanced' and then click on 'Security'. Select 'Use a private certificate store' and then select the custom CA from the list of available CAs.
🎯 Final Words
By following these steps, you should be able to resolve the Remote Desktop certificate error and connect to your remote computer without any certificate-related warnings. Remember to always use self-signed certificates with caution and consider using a trusted root CA for all RDP connections.
❓ Frequently Asked Questions
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