I have a few different domains registered on my server and a policy to give each person an address for each, if I select the to field in a new email in outlook and type anything other than the main domain email address i get an error saying
You can't send a message on behalf of this user unless you have permission to do so. Please make sure you're sending on behalf of the correct sender, or request the necessary permission. If the problem continues, please contact your helpdesk.
Diagnostic information for administrators:
/O=FIRST ORGANIZATION/OU=EXCHANGE ADMINISTRATIVE GROUP (FYDIBOHF23SPDLT)/CN=RECIPIENTS/CN=Simon
Does anyone have any ideas.