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Exchange Online TLS Connectors

Renew an Exchange Online Send or Receive Connector TLS Certificate​

Connect to Exchange Online through Powershell​

Install the Exchange Online modules​

  1. Open powershell as administrator
  2. Issue the following commands and login as Exchange Administrator or Global Admin:
Install-Module -Name ExchangeOnlineManagement
Import-Module -Name ExchangeOnlineManagement
Connect-ExchangeOnline

Replace certificate for Send or Receive Connectors​

Get-OutboundConnector | fl​

  1. Get the thumbprint of the new certificate that you've just imported: Get-ExchangeCertificate | fl
  2. Make note of the thumbprint and issue the following commands:
$certificate = Get-ExchangeCertificate -Thumbprint "<insert thumbprint>"
$tlscertificatename = "<i>$($certificate.Issuer)<s>$($certificate.Subject)"
Set-SendConnector "Name of Send connector" -TlsCertificateName $tlscertificatename
  1. Confirm that the commands you have just run were successful, by issuing the following command:

Get-OutboundConnector | fl​

  1. Repeat the above steps, incase you have any receive connectors that are using TLS:

Get-InboundConnector | fl​