When using the On Demand Migration (ODM) Domain Coexistence Address Rewrite Service (to Source), if a non-migrated sends an email to a group of users, and includes a migrated user, then that Migrated user selects Reply All, they will receive a CC copy of the email from themself with their non-rewritten address.
This is expected behavior and is described in the "Address Rewrite Service Considerations" section of the ODM Administrators Guide under "NOTEs":
Here is a snippet:
NOTEs:
In case an email is sent to a group of people, including a migrated user, that email is automatically forwarded to the migrated user, and then if the migrated user clicks Reply all, he / she gets a copy of his / her reply message. This is default behavior.
© 2024 Quest Software Inc. ALL RIGHTS RESERVED. Terms of Use Privacy Cookie Preference Center