We currently experience the problem that a user cannot send a mail to herself. She get the error that she's not allowed to send e-mails from this address.
(You are not allowed to send on behalf of this user...)
Her e-mail address is AAA@domain.com. (From AAA@domain.com to AAA@domain.com)
She can:
We make use of Office 2016 and Exchange 2010 14.03.0399.000
I found out that the local address book was corrupt. Disabled addressbook, deleted the local file and enabled it again.
This solved the issue