Some users have problems forwarding mails.
We have one mailbox the firstname.lastname@example.org that has about 10 e-mailaddresses configured on it.
so all mails sent to email@example.com, firstname.lastname@example.org, email@example.com come into 1 mailbox.
When the user creates a new mail and selects firstname.lastname@example.org in the from field all the mails get forwarded.
When the user creates a new mail and selects email@example.com in the from field the user gets the error:
"You do not have permission to send to this recipient. For assistance, contact your system administrator."
The firstname.lastname@example.org is not the primary SMTP address but a secondary.
This should work, how can we fix this or is there a fix from MS?