Exchange ServerIn , Transport Certificate is an important component used especially in Exchange Server Frontend and Backend flow scenarios. During the installation of Exchange Server, a basic transport certificate is automatically created for each server. This certificate is NETBIOS is configured using the name.
A missing or faulty transport certificate can disrupt mail flow on the affected machine or related systems. Therefore, it is very important to have a valid and appropriate certificate on the machine. It is generally not recommended to change this underlying certificate, which is automatically generated and signed by Exchange.
Steps to Create an Exchange Server Transport Certificate
You can renew your existing transport certificate or create a new certificate with the PowerShell command I have provided below. This process is critical for the security and efficiency of Exchange.
$newInternalTransportCertificateParams = @{
Server = $env:COMPUTERNAME
KeySize = 2048
PrivateKeyExportable = $true
FriendlyName = $env:COMPUTERNAME
DomainName = $env:COMPUTERNAME
IncludeServerFQDN = $true
Services = "SMTP"
Force = $true
ErrorAction = "Stop"
}
New-ExchangeCertificate @newInternalTransportCertificateParams

This command creates a new transport certificate on the system. The created certificate contains the fully qualified domain name (FQDN) of the server and is valid for SMTP services.
Checking Exchange Server Transport Certificate
You can check the generated certificate via Exchange Management Console (EAC) or Exchange Management Shell.
- Log in to the EAC console from your Exchange Server
- Follow the steps Servers – Certificates
- In the Certificates section on the EAC Console, you can see the Transport Certificate that you created with the server name or the Friendly Name assigned by you.
To view the certificates in your Exchange Server environment with Exchange Management Shell:
Get-ExchangeCertificate | Format-List
You can check out our other articles about Exchange Server or “Exchange Server This mailbox database contains one or more mailboxesYou can review the topic ".