Resolving the Get-ExchangeCertificate Blank Output Issue in Exchange Server

Resolving the Get-ExchangeCertificate Blank Output Issue in Exchange Server

If you've encountered a situation where running the Get-ExchangeCertificate cmdlet in Exchange Server returns a blank output, you're not alone. This issue can be frustrating, but with the right steps, it can be resolved efficiently. In this post, we'll walk you through the process of diagnosing and fixing this problem.

Understanding the Issue

When you run the Get-ExchangeCertificate cmdlet, you expect to see a list of certificates along with their details. However, sometimes the output is blank, showing only the headers "Thumbprint," "Services," and "Subject" with no data underneath. This typically indicates an issue with the Exchange Auth certificate.

Steps to Resolve the Issue

1. Check the Microsoft Exchange Server Auth Certificate:

   • Use the MonitorExchangeHybridCertificate.ps1 script to check the status of the Auth certificate. This script will provide details about the current certificate and its validity.

   !MonitorExchangeHybridCertificate.ps1 Output

2. Renew the Exchange Auth Certificate:

   • If the Auth certificate is missing, expired, or corrupted, you need to renew it. Run the Renew-M365AuthCertificate.ps1 script to generate a new Auth certificate.

   !Renew-M365AuthCertificate.ps1 Output

Assign the New Certificate:

After renewing the certificate, assign it for OAuth authentication using the following commands:

Set-AuthConfig -NewCertificateThumbprint <NewCertificateThumbprint>

Set-AuthConfig -PublishCertificate

Restart Services on All Exchange Servers:

Restart-Service MSExchangeServiceHost

Restart-Service W3SVC

Restart the necessary services on each Exchange server to apply the new certificate:

Verify the New Certificate on Each Server:

Get-AuthConfig | fl CurrentCertificateThumbprint

On each Exchange server, verify that the new certificate is in use:

Run the Get-ExchangeCertificate Cmdlet Again:

Finally, run the Get-ExchangeCertificate cmdlet on each server to ensure it displays the expected output.

Conclusion

By following these steps, you should be able to resolve the issue of the Get-ExchangeCertificate cmdlet returning a blank output. Regularly monitoring and renewing your Exchange Auth certificate is crucial for maintaining a healthy Exchange environment.