Exchange SSL Error

Today we got an Error on our Exchange Servers:
An error occurred while using SSL configuration for endpoint 0.0.0.0:444. The error status code is contained within the returned data.
 Outlook did not connect with our Exchange and we didn't get any new mails.
OWA just showed a white screen after logging in.

I fixed it this way:

netsh http show sslcert
This shows the  ssl certificate bingings, we want to delete the not working binding and reassign it. Paste the output in a new notepad instance. then:

netsh http delete sslcert ipport=0.0.0.0:444 
iisreset
Now you need the thumbprint/hash of your certificate (you get it from the other certificates in the list we copied or from the properties of your certficate):
netsh http add sslcert ipport=0.0.0.0:444 certhash=XXXXXX  appid=”{XXXXXXX}”
iisreset 

Now it should work again.

Greets, Waldi

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