I have a Windows SBS 2008 server, on which I have setup 2 domain names.
I have tested that I can send out on both.
Some users have email addresses attached to both domains, ie: JohnSmith@domainA.com JohnSmith@domainB.com
When I setup Outlook (2010) attached to DomainA email account, and then add in the account for DomainB, it won't let me send from the Domain B account. I have setup send as permissions on Exchange. Any ideas why this won't let me select a drop down to send from DomainB?
At the moment I have tried sending by typing in the email address for DomainB manually, and it comes up with permission issues.