Fix Exchange Error 12014 Using Best Available Techniques

Ugra Narayan Pandey | October 23rd, 2019 | Exchange Server

Nowadays, everyone is concerned about the technology due to which the technology upgradation is at its peak. There are many platforms that are available for the storage of essential information. Microsoft Exchange Server is one such platform that allows users to implement cross-communication. But, there are a lot of errors which a user can encounter while using Exchange Server and Exchange Error 12014 is one such error.

This error generally occurs in Exchange 2019, 2016, 2013, 2010 or 2007 and can be encountered while loading certificate when the connection is made between TLS and SMTP for the purpose of authentication. The users who are facing this error can refer this article as it explains the root causes behind the Exchange error 12014 and both manual as well as efficient solution such as EDB to PST Converter Software to fix the issue.

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Why Exchange Error 12014 Occurs?

The factors which could be responsible for this issue are listed in the following section:

  • If a user changes Fully Qualified Domain Name in the send or receives connector to match outside DNS Code. There are chances that the error will be displayed.
  • Another factor which can arise the issue is when a user installs a custom certificate on Microsoft Exchange Server but the certificate which is changes has the same FQDN. Although, the certificate is not empowered for SMTP.
  • Transport Layer Security needs a valid certificate which is to be installed in the Personal Certificate Store on the system.

Procedures to Resolve Exchange Error 12014

There is a various number of methods available to fix the issue without any issue:

Solution 1:

  • The first step is to check the configuration of the certificates which are available on the Microsoft Exchange Server. You have to verify the configuration of both send and receive connectors installed on the server. You can apply the following commands to check the configuration:

Fix Exchange Error 12014 Manually

  • To fix Exchange 12014 error, you have to compare between the returned FQDN with warning and the one specified on each connector and with “CertificateDomains” values which are specified on each certificate.

Important Note – “CertificateDomains” is the sequence of the Subject and Subject Alternative Name Fields on the certificate.

  • The motive of comparison is to examine each connector that is using the TLS consists of an associated certificate. It consists of connector’s like FQDN, which lies in the “CertificateDomains” value of the certificate.
  • The values of services on each certificate is mandatory to be examined. If a user is using a TLS certificate, then it is necessary to make it accessible for SMTP service with an SMTP service value.

Solution 2:

Another solution to resolve Exchange error 12014 is listed below:

If the name of a fully qualified domain is not specified on the “CertificateDomains” parameter, then the new certificate is to be created. Along with it, the FQDN of the connector which was returned in the warning should also be specified. You can use “New-ExchangeCertificate” cmdlet to create a new certificate.

Solution 3:

If any third party custom certificate is installed on the Exchange server and has a similar FQDN but the certificate is not enabled for SMTP service, then that certificate should be enabled for the SMTP service.

Solution 4:

If the above mentioned manual methods do not provide you satisfactory results and you are not able to access your Exchange database data. Then, there is an expert solution that will help you to convert EDB emails to Outlook file format. It has a simple and user-friendly interface that can be used by both technical and novice users. The application can also repair the corruption issues in EDB file and if the Exchange error 12014 is occurring due to corruption, then it can also transfer damaged emails stored in the Exchange database file.


In this article, we have explained the root causes behind the Exchange error 12014. After that, the manual and expert solutions are discussed. At first, users can find the issue why they are getting the error and after that, they can apply the method which best suits their problem.