we have a hybrid org on office 365 with one Exchange server 2019
If I make a new account with an email address domain that has an mx record pointing to office 365 then office 365 bounces the email
message 550 5.4.1 Recipient address rejected: Access denied. AS(201806281)
What is going wrong?
Buy new and refurbished computer equipment
When I try and create a send to exchange on premise server, I am getting;
450 4.4.317 Cannot connect to remote server [Message=UntrustedRoot] [LastAttemptedServerName=mail.domain.suffix] [LastAttemptedIP=x.x.x.x:25] [LO2GBR01FT025.eop-gbr01.prod.protection.outlook.com]
Log into the exchange 2019 server and install edge
Log into the Exchange server ECP admin page and go to the hybrid setting page.
Download and install the hybrid set-up and configure with the wizard.
If you are keeping the Exchange server then choose a full hybrid set-up.
Once it has configured the hybrid environment then try the email addresses again and it should be working.