Renew Exchange Cert

Question

Hi,

Our Setup

• Server 2012
• Exchange 2016

Our environment is Hybrid

Our Exchange cert was about to expire so I have renew it using below setup but some of the mailbox flow is failing for internal domain

Steps

1. Run this command on both Exchange Servers
   1. Enable-ExchangeCertificate -Thumbprint "New Cert" -Services IIS,SMTP
      1. Then Run

              1. $TLSCert = Get-ExchangeCertificate -Thumbprint "New Cert"
         
                                $TLSCertName = "<I>$($TLSCert.Issuer)<S>$($TLSCert.Subject)"
         

         1. Then Run

                    1. Get-SendConnector "Outbound to Office 365*" | Set-SendConnector -TlsCertificateName $TLSCertName
            

            1. Then Run

                          1. Set-ReceiveConnector "xxxxx\Default Frontend xxx" -TlsCertificateName $TLSCertName
               
                                                        Set-ReceiveConnector "xxxx\Default Frontend xxxx" -TlsCertificateName $TLSCertName
               

               1. Restart IIS
                  1. Restart Transport service and Frontend Transport service
                     1. Run Hybrid wizard with default selection and select new cert at the end

Now When we send email to internal address its failing with this message

Answer 1

Hi @lalajee

I would like to confirm with you where the email addresses of your internal recipient and sender are?

Are they all local? Or is the sender local and the recipient online?

Also, I found this: Error code: 450 4.4.315 Connection timed out

Regards

Shaofan

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