Resolve Exchange Transport Error 12014 for Exchange 2013, 2010 & 2007

admin | October 27th, 2017 | Microsoft Exchange

With the advancement in Exchange server functionality, a user is facilitated with various features along with storing the essential user’s data. But sometimes a user might face error like Exchange Transport error 12014 for Exchange server 2013, 2010 &2007.

Understand Event id error 12014

The error is generally caused during the loading of Certificate file on the Exchange server. This is possible when there is a secure connection established between both Trasport Security Layer (TLS) and Simple Mail Transport Protocol (SMTP). This connection is important for the authentication of the user request. And if any of the above goes wrong the user experiences an Exchange 2013, 2010, 2007 Error 12014.

The error needs to be handled and solved with great caution as if it is mishandled it will cause more complex problems. So firstly let’s take a look at the best solution.

An Expert Solution

Exchange Transport error 12014 can be resolved with the use of an automated solution which will recover highly corrupted EDB files. These files are stored in Exchange server database and with the user of this tool, the event id 12014 error can easily be fixed. The software has a user-friendly interface and can be used by a novice user.

Reasons for  Exchange Error 12014 Occurrence

  • At times when a user changes the FQDN of sender’s or receiver’s connector in order to match the external DNS, this problem can arise. This certification issue causes great trouble and is hinderance during work.
  • Another cause is, on the installation of certificates on Exchange server, the changed SSL certificate has a common Fully Qualified Domain Name. Moreover, the certificate cannot be empowered even for Simple Mail Transfer Protocol.
  • The Transport Security Layer needs a legitimate certificate installation in Personal Certificate store for the system.

Fix Exchange Transport error 12014

The following resolution techniques will help you troubleshoot the error that too without any efforts.

Method 1:

  • In this method, you need to check the configuration of all certificates that are installed on the server. Moreover, you also need to analyze the configuration of send and receive connectors.
  • Hence, to solve error 12014 in Exchange 2013, compare the FQDN and available “Certificate Domains” value which is defined on every certificate. Note that the CertificateDomain value is the sequence of Subject and Subject alternative name.
  • By making a comparison between the connectors,  you can be sure that each connector is utilizing TLS with their corresponding certificates.
  • Properly Examine the services value of each certificate. And in case of TLS certificate don’t forget to enable the SMTP services.

Method 2:

This method will be helpful in case when the solution 1 did not give you the results. When the FQDN is not specified or mentioned in the “CertificateDomains” parameter. Then in this situation, you need to create a new certificate and mention the FQDN connector – the returned warning message. To do so you can use “New-ExchangeCertificate” cmdlet.

Method 3:

Use this solution if you have installed a third party or even a custom certificate on the server which can be easily matched to the respective FQDN. But in this newly created certificate, the SMTP services are still not enabled. You need to enable it to make a successful SMTP connection.

Limitations of Manual solutions

  • The discussed solutions are very lengthy and will take a lot of effort and time in solving MS Exchange Transport Error 12014.
  • In order to implement the methods, a user must have some understanding of Exchange server. Hence, it will b very difficult for a novice user, to put together everything.


All possible solutions for Exchange Transport error 12014 are discussed in the blog. Both manual and automated solutions are mentioned but because of easy and efficient usability Direct method is more preferred. The user can solve the event id 12014 error more accurate with a professional tool and too with more accuracy.