Recipient not found by Exchange Legacy encapsulated email address lookup
When you send an email to a recipient, you get IMCEAEX NDR that said “Remote Server returned ‘550 5.1.11 RESOLVER.ADR.ExRecipNotFound; Recipient not found by Exchange Legacy encapsulated email address lookup’”. This issue is happening when you migrate a mailbox with no direct path. Resolution You need to create an X500 email address alias and set … Read more