Certificate error FailureCategory=Cafe-SendFailure Exchange server

This presents as a weird issue where you can log into the the ecp but then get a 503 error, you can’t use the Exchange management shell and the users clients are showing a certificate error but the certificate is valid.

I recently renewed a certificate on a Exchange server and 2 weeks later after a reboot it dropped the certificate from it’s bindings.

  • Launch IIS Manager
  • Expand “Sites” under the server with this issue
  • Click on “Exchange Back End”
  • In the actions pane to the right, click on “Bindings”
  • Select the https type and click on “Edit”
  • Select the appropriate certificate and click on Ok.

Source

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