Hi, I wonder if someone can give us some guidance. I hope this makes sense.
In exchange 2010 console, under organization configuration > hub transport > accepted domains, we have :
abc.co.uk - authoritative (default true)
def.london - authoritative (default false)
abc.co.uk is our AD domain and we have no issue with this. def.london is a new accepted domain which has an MX record pointing to our external exchange IP.
In order to send and receive emails from email@example.com, we did the following :
created a new AD OU New Division in abc.co.uk
created a new mailbox firstname.lastname@example.org with the SMTP address of email@example.com
In exchange console, under organization configuration > hub transport > e-mail address policies, we have :
New Policy - priority 1(applied) – for recipient container abc.co.uk/New Division
Default Policy - priority Lowest (applied)
We can successfully send and receive emails from/to firstname.lastname@example.org and they appear to come from email@example.com. Great.
We now need firstname.lastname@example.org to be able to send and receive emails for email@example.com, and have granted firstname.lastname@example.org full access rights and send as permission to email@example.com.
Unfortunately, every time we attempt to send an email in Outlook 2010 using firstname.lastname@example.org in the From field, we get :
"You can't send a message on behalf of this user unless you have permission to do so …."
Interestingly, if we change the primary SMTP address on email@example.com to firstname.lastname@example.org, we can send as with email@example.com.
Have we missed a step, or is this simply not possible using a primary SMTP address from the accepted domain?