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This guide describes the installation process on Exchange 2010. If you have an issued certificate signed by Comodo, it should be sent to you via email (the issued certificate is usually sent to the administrative email address which was chosen during the certificate activation).

You will need to have a certificate file with the .cer extension (the file with the .p7b extension from ZTABOX email). This file should be copied to your Exchange server (the certificate should be placed in the Computer Store of the server).

Once done, follow the steps described below:

1. Start the Exchange Management Console. In order to do it, click Start > Programs > Microsoft Exchange 2010 > Exchange Management Console
2. Once done, mouse over the "Manage Databases" link and click on it. Then, go to "Server configuration"
3. You need to select your certificate from the menu in the center of the screen; the certificate is listed by its Friendly Name. Then click the link in the Actions menu to "Complete Pending Request".
4. To complete the pending request, browse to your certificate file, then click Open > Complete:



NB: If you face an error message which is frequently shown in Exchange 2010 stating that "The source data is corrupted or not properly Base64 encoded.", please ignore it and hit F5 to refresh the certificate. Then verify that it says "False" under "Self-Signed" now.
If it still shows "True", there are 2 possible reasons:

- you may have selected the wrong certificate or
- you may have generated the request on a different server.
In order to fix this error, you can create a new CSR on this Exchange server and reissue the certificate.


5. For enabling your certificate to use, return to Exchange Management Console and click the link to "Assign Services to Certificate...":



6. Choose your server from the list, then click Next:



7. Apply the certificate for the services for which you would like to enable your new certificate by clicking Next > Assign > Finish:







8. Once all the steps are completed, your issued certificate should be installed and enabled for use with Exchange:

Your certificate installation can be checked here.