Is there any way in Office 365 to set up an auto reply for all e-mails except for mailboxes that have a certain domain as their reply address? For example, we sold our domain name @a.com to the company a.com which has 27 mailboxes on our O365 tenant account. Those mailboxes will stay on this original account. Those mailboxes have @a.com set as their default reply address. We are moving 400-some mailboxes that have @b.com as their default reply address to a new O365 tenant account. But they also have @a.com set as one of their e-mail aliases. We want people to stop sending to these @b.com mailboxes with the old @a.com e-mail address since the e-mail won't work once we move the mailboxes to the new O365 tenant account in a month.
So, is it possible to set up an auto reply for all mailboxes where the default reply address is @b.com (the...