“The user account which was used to submit this request does not have the right to send mail on behalf of the specified sending account” The outlook client displayed the following error:
The Macintosh users were complaining that their outlook client couldn’t send e-mails anymore.
SymptomsĪfter the migration of all mailboxes to Exchange 2013 CU4 (aka SP1), I received complaints from Outlook for Mac:2011 users. Mac users with Outlook for Mac:2011 couldn’t send e-mails after the migration. The migration process went relative well, except for one peculiar problem: I didn’t do an in-place upgrade but I chose rather to build an Exchange 2013 CU4 environment and then migrate all mailboxes. Recently I upgraded our hosted exchange 2013 CU1 servers to CU4 (aka SP1).
