I have listed all certificates and have six (see below for full details). Use Get-ExchangeCertificate to identify the thumbprint of the certificate you want to be default. Install Exchange certificate with PowerShell - ALI TAJRAN Use Enable-ExchangeCertificate -Thumbprint XXXXXXX -Services 'iis,smtp' to assign the services. smtp - Problems with certificate in Exchange 2016 - Server Fault Generate a new self-signed certificate: This command pipes the existing certificate object to the New-ExchangeCertificate cmdlet, which uses its properties to generate a new self-signed certificate. Wrong SMTP certificate on Exchange Server 2016 The Ether: How to update the server certificate in Exchange 2010 … secrets The previous examples do not set the default value for the newly created registry key. In my case, the default STMP certificate expires on the 17th of June 2020. Confirm Overwrite existing default SMTP certificate, Resolution. Enable-ExchangeCertificate -Thumbprint "The Certificate Thumbprint" -Services SMTP. 1. overwrite the existing default smtp certificate Example 2 A certificate thumbprint will get created here. Thumbprint Services Subject. This certificate is also … If it asks you to overwrite the certificate that’s already there, press Y and press Enter. overwrite the existing default smtp certificate - ddcnet.com After importing the certificate, I went on to assign services to it. The continued use of that FQDN will cause mail flow problems. This is a big long ugly number, do yourself a favor and copy it to clipboard instead of trying to type it. The default SMTP certificate is used to encrypt SMTP sessions between transport servers in your organization. I have had to renew SMTP certificate on EDGE servers. When you install Microsoft Exchange Server on a Windows Server installation, it creates a self-signed certificate with a validity period of 5 years. Here is the process. A certificate thumbprint will get created here. Add the partner's permission group to the local Exchange server's default receive connector.