I have been working with an exchange professional over the course of the last couple weeks to migrate our exchange server to 365 we have configured our existing server to run in a hybrid configuration and have completed the setup as well as a test user migration. The issue now is when sending mail from a migrated 365 account to our internal server we are now receiving a certificate error message. We are at a loss as to what it could be. Below i have included as much information as i could at the moment please any insight would be great.
Thank You
As you can see the MX is point to mail.w***.com (firewall), if we send any email to pcmtest@wbcci.com (office 365 mailbox) no matter whether it is from om-premise or from externally (Gmail/Hotmail/yahoo) it goes to firewall and it is rejecting that email, it even not getting delivered to Exchange.
In Exchange SMTPsend logs we are unbale to found any entry for office 365 as it is being blocked or rejected by Firewall.
Here is the message trace from my office 365 tenant to your office 365 tenant. Here you can see mail has been delivered to Firewall but it not yet defer to exchange.
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