When you install multiple Exchange server, you can install same digital certificate on all servers. There is no need to purchase or issue different certificate for each Exchange servers. When you purchase and install a certificate in one Exchange server, you can export that certificate and import on other Exchange servers. So in this post, I will show steps to export and import certificate in Exchange 2016. You can also export certificates from Exchange 2007/2010/2013 and import in Exchange 2016.
Export and Import Certificate in Exchange 2016
To export the certificate, log on to Exchange Admin Center (EAC) on the Exchange server where the certificate is already installed.
Click Servers on the features pane. Select certificates tab. From the Select server option, select the server where the certificate is already installed. I have already installed certificate in MBG-EX01 Exchange server. This server is in fact, selected by default. Below, you will see list of certificates installed in the server. Select the digital certificate installed for Exchange services as shown above. Click more and click Export Exchange certificate option. Exchange certificate export page opens up.
The certificate needs to be stored on shared folder. So make sure you already have shared folder created. Type the UNC path of shared folder and name of the exported certificate. Here, I exported to \\MBG-EX01\Cert shared folder with the certificate file named SSLCert.pfx. Type the password. You will need this password while importing the certificate in another server. Click OK to complete the export wizard.
You can browse the shared folder and view the certificate as shown above. To import the certificate go to another Exchange server, select the server from the drop down of select server option.
Here, MBG-EX02 server is selected as shown above. Click more and click Import Exchange certificate option.
Type the UNC path of the shared folder where exported certificate is stored. Enter the password and click Next.
Click + to specify the server you want to apply the certificate to. Select MBG-EX02 from the list and click add. Click OK.
Click Finish to complete the certificate import.
Double-click the certificate and select services. Check the services to assign this certificate too. Click Save. Click Yes on the warning saying this will replace the current certificate.
You can view the certificate is now installed and valid in MBG-EX02 server. In this way you can export and import certificate in Exchange 2016.