Here are the steps to troubleshoot issues with Exchange server certificates:

1. Check certificate configuration – verify that the server is running with a certificate that meets requirements for Exchange server.


2. Identify certificate issues – review the certificates on the server and investigate any issues with them.


3. Update the Exchange configuration – update the certificate information within the Exchange configuration to make sure it's pointing to the correct certificate.


4. Test the connection – test the connection of the Exchange server to ensure the certificate is working correctly.


5. Verify expected behavior – examine the behavior of the server to make sure it's running as expected.