We have an old domain name that was used by a company we absorbed. Some employees have a secondary address with a firstname.lastname@example.org email address on their mailbox. What are my options for sending an auto-reply to any sender that sends an email to that old domain name? I my understanding, any recipient with an @olddomain.com address would need to set up a Rule/Auto-reply individually. Is there a way to do this at the server/domain level?
Currently using Exchange 2010 but will be upgrading to 2013 or even 2016 in the next few weeks. Employees are using Outlook 2010 or 2013.
Our goal is to send replies to senders that the old domain will be going away and then phase it out.