We desperately want to move to Office 365 but have an unusual scenario. We have a requirement (for compliance reasons) to do processing on ALL (ie internal as well external) outbound emails via a third party. There must be a way of achieving this, but I cannot figure it out yet.
Its not very different to hybrid coexistence scenario where some mailboxes are on Exchange Online and some are On-Premise. However, by default if Exchange can see a local mailbox for a recipient it will just deliver that mail directly, without giving us the opportunity to send it via our third party first. There must be a way to "trick" exchange online to achieve this - can anyone help?
Many thanks
Dan