Hi, I'm unable to send a email from my on-premise exchange 2013 server to my exchange online server.
Both have separate domain, and the O365 is synced with my AD with Dirsync, it's for all our student.
When I try to send a email from my email to a student address I have NDR error
Remote
Server returned '420 4.2.0 Recipient deferred because there is no Mdb'
The O365 domain is reachable if we send from external address to O365 it's fine. If we send email from O365 to our on-premise server domain, it's fine. It's only when my server want to send to 0365 account.
The O365 domain isn't listed in accepted domain in our on-premise server should be created?
I Have a send connector for the o365 domain in our on-premise server and he take MX to send to the domain and the type is personnalized. Is it correct?
In the get-hybridconfiguration the 0365 isn't listed, should it be since the 0365 domain will not be in our on-premise server.
Thanks