Hi! I have On-prem Exchange 2019 and O365, without hybrid scenarios deployed. I added domain to my on-prem exchange and created send connector to internet. If i send email to user in O365 all works fine, but if i send mail to shared mailbox i get receive error LED=550 5.1.10 RESOLVER.ADR.RecipientNotFound; Recipient not found by SMTP address lookup
As far i understand it's happened because i doesn't have hybrid, right?