Enable-ExchangeCertificate : The certificate with thumbprint XXXXXXXXX was found but is not valid for use with Exchange Server
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+ Enable-ExchangeCertificate -Thumbprint XXXXXXXXX -Services "IIS"
The above error can as a result of multiple reasons. CSR was created with IIS and attempted to be installed through the Exchange Management Shell (EMS), CSR was created in EMS on another Exchange Server, a damaged certificate, or Windows simply “forgets” where it placed the PrivateKey for the certificate. It doesn’t happen all the time, but sometimes the error can be a nuisance.(more…)