We have thousands of alumni that needs be moved to Office365. Our mailboxes email@example.com was all migrated to Office365. Our alumni doesn't have a mailbox but they have an AD account that has alumni address in mail attribute and forward to their personal address by using Iron Port query.
Now we need to migrate these alumnis to Office365 but we need to do it phase migration as there are tons of them.
The request is if the alumni if migrated to Office365---> Route to Office365 alumni mailbox
If the alumni address is not migrated --> Route to their personal address
Recipient Email to Rewrite the Envelope Recipient:
Alternative Mailhost Attribute: CloudSMTP
The condition above works fine from #1 to #3 (if migrated) but I don't know how to Route to External Address if the Query string is NO or not in the user accounts attribute. Its seems like two actions or double route is possible using the same LDAP? Should I create another LDAP?
When an email sent from internet to firstname.lastname@example.org, it will query my IronPort LDAP and route the email using Routing Query string mail and cloud attribute.. If its yes then it will route to Office365.
If its NO, it will query another LDAP or query AlumniAddress and route to InternetAddress