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Fwaggle's avatar
Fwaggle
Copper Contributor
May 19, 2023

How to determine what SSL Certificate used between On-Prem and Exchange Online

Hi,    After renewing our SSL Certificate for SMTP this week on our On-Prem Exchange 2019 server,  I was reviewing our Send Connector configuration to Exchange Online and no SSL Certificate was def...
exchange online
Exchange Server
Andres-Bohren's avatar
Andres-Bohren
Iron Contributor
May 21, 2023

Hi Fwaggle 

 

#Inbound Connector in Exchange Online

Get-InboundConnector -Identity "Inbound from b96bdae2-5722-45d3-b38c-8dca846c63ba" | fl Name, *TLS*,Restrict*

Name : Inbound from b96bdae2-5722-45d3-b38c-8dca846c63ba
RequireTls : True
TlsSenderCertificateName : *.icewolf.ch
RestrictDomainsToIPAddresses : False
RestrictDomainsToCertificate : False

 

#Send Connector on Exchange Server

Get-SendConnector -Identity "Outbound to Office 365 - 138c6133-e050-4107-9421-d1e9abf64b49" | fl name,fqdn,TLS*

Name : Outbound to Office 365 - 138c6133-e050-4107-9421-d1e9abf64b49
Fqdn : mail.icewolf.ch
TlsDomain : mail.protection.outlook.com
TlsAuthLevel : DomainValidation
TlsCertificateName : <I>CN=Go Daddy Secure Certificate Authority - G2, OU=http://certs.godaddy.com/repository/,
O="GoDaddy.com, Inc.", L=Scottsdale, S=Arizona, C=US<S>CN=mail.icewolf.ch

 

If no TLSCertificateName is set on Send connector it could be the default SMTP Certificate

 

https://dirteam.com/bas/2020/06/24/field-notes-what-is-the-current-default-smtp-certificate-for-your-exchange-server-environment/

 

Regards

Andres

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