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Exchange 2013 The certificate key algorithm is not supported

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Exchange 2013 The certificate key algorithm is not supp... - 19.Dec.2021 5:27:26 PM   
GTA_doum

 

Posts: 16
Joined: 11.Jan.2009
Status: offline
Hello,

We have an Exchange 2013 server, updated to CU23, which worked fine until one day, it showed the error on OWA "The certificate key algorithm is not supported"!
I tried to put back an older valid certificate, reactivate all ciphers and TLS, updated to latest Microsoft patches, this error still comes back and I cannot manage the server anymore!
Anyone has a clue how to resolve this issue?

< Message edited by GTA_doum -- 19.Dec.2021 5:28:31 PM >


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Dominic
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