We have a user who works for two divisions of the company and needs to receive and send emails from two email addresses - firstname.lastname@example.org and email@example.com
We are trying to accomplish it with 'the least administrative effort' as Microsoft would say in their tests.
What I have found so far:
1) Create two AD users, two mailboxes and grant User1 SEND AS rights for second mailbox.
2) Create a distribution group, place User2 in it and grant rights to User1 over User2 Distr Group
What I am attempting to try:
Create a Mail Contact firstname.lastname@example.org in Exchange
create a transport rule in Exchange to forward email@example.com emails to firstname.lastname@example.org (tested, works correctly),
Grant SEND AS rights to user1 for Mail Contact email@example.com
Oubound emails still generate the error "You can't send a message on behalf of this user unless you have permission to do so. "
Your help is greatly appreciated.