Hi folks, this is the thing, we have two cloud based email services one with Office 365 and the other with, let's say, CLOUDSERVICE. For 3 months everything was working OK, we were testing the Office 365 solution, and all was fantastic, we configure correctly the shared domain in both services, and worked perfectly, mail go on and forth, but then we got into this... I have N users that will stay in the CLOUDSERVICE email service and X users that will use Office 365, but we have to have a Global Address Book that contain both email addresses, the ones from Office 365 and the ones from CLOUDSERVICE, so our users in Office 365 can search and find ALL the addresses of the company.
OK, we tested adding some addresses as external contacts in Office 365, because those users don't have mailboxes in O365 but they have in CLOUDSERVICE servers. But we get the issue that when we send emails to those addresses we have an error back saying that the mail box doesn't exist (in O365).
So, how can we get all the corporate addresses in one place, so our users in Office 365 can really "use" them, but the emails that are been send to addresses whose mailboxes are in CLOUDSERVICE, are correctly routed to that service and O365 stop looking for those mailboxes locally.
Hope you can help me. See you around.