Saturday , March 23 2019

Certificate is invalid and revocation check failure in Exchange Server

When you import a certificate from a certificate authority . It checks the revocation status of an SSL Certificate, the client connects to the URLs and downloads the CA’s CRLs. Then, the client searches through the CRL for the serial number of the certificate to make sure that it hasn’t been revoked.

but when exchange servers has internet. It will not have any issues. But when its behind the proxy. it may not have issues if your proxy is configured through .use automatic detect settings.

As it uses the system account  –  System account has its own proxy settings – Lets see how to access the systems account proxy settings.



Revocation Check failure


To check your CRL urls – Use internet explorer – Security lock – view certificates

Solution –

Download Sysinternals to check the system proxy settings

Get PsExec.exe into a folder. browse to command prompt.


PsExec.exe –i –d –s cmd

run whoami make sure you are in system account proxy settings

inetcpl.cpl to access system proxy settings


Entered my proxy settings. Click ok.


Reboot the server.

Certificate is valid now.


About Satheshwaran Manoharan

Satheshwaran Manoharan is an Microsoft Exchange Server MVP , Publisher of
Supporting/Deploying/Designing Microsoft Exchange for some years.
Extensive experience on Microsoft Technologies.

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