I have created a new shared mailbox, one of the users that I have delegated full access to and send access to, cannot send from it. I have verified with 2 other users that they can send from the address. I'm wondering if there is a setting in outlook that I am missing. When I try to send an email from the users account and select the shared email address as the from, I get an email back saying they do not have permission to send from that account.
