Wednesday, September 27, 2017

An error occured while using SSL configuration for endpoint

A customer of mine contacted me complaining Exchange was down, OWA failed, and all Outlook clients could not connect.  They were running Exchange 2013 CU13.

In the system logs, the following error was experienced throughout:

Log Name:      System
Source:        Microsoft-Windows-HttpEvent
Date:          28/09/2017 7:24:32 AM
Event ID:      15021
Task Category: None
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      exchange.domain.local
An error occurred while using SSL configuration for endpoint  The error status code is contained within the returned data.

When attempting to open Exchange Management Shell, the following error was experienced.

VERBOSE: Connecting to exchange.domain.local.
New-PSSession : [exchange.domain.local] Connecting to remote server exchange.domain.local failed with the following error message : [ClientAccessServer=EXCHANGE,BackEndServer=exchange.domain.local,RequestId=3c48101b-0062-4799-b902-07b2b634321c,TimeStamp=28/09/2017 12:47:18 AM] [FailureCategory=Cafe-SendFailure]  For more information, see the about_Remote_Troubleshooting Help topic.
At line:1 char:1
+ New-PSSession -ConnectionURI "$connectionUri" -ConfigurationName Microsoft.Excha ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : OpenError: (System.Manageme....RemoteRunspace:RemoteRunspace) [New-PSSession], PSRemotin
    + FullyQualifiedErrorId : -2144108477,PSSessionOpenFailed

If we look at the error, it was complaining about SSL on  This is the Exchange Backend Website, the frontend website listens on

We fired up IIS Manager, checked the backend website and looked at the SSL Binding.  There was no certificate attached for some reason.

I just re-attached the backend certificate, the default self signed certificate generated by the Exchange installation process is fine.
Then ran an "iisreset" on the Exchange server.
All was fine again.

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