Mapping automatically disabled (4293915)

Issue
When migrating to Exchange/Office 365 and facing error “the smtp address has no mailbox associated with it” mapping can be automatically disabled without any notification in logs.
Explanation
Disabling such mapping automatically should help to avoid performance degradation.
We´re working on a more user-friendly solution to be able to see more detailed log entries and be able to define one or more errors for which the mapping will be disabled automatically.