Email Forwarding on an on-prem mailbox to Office 365 mailbox

Hi All,

I need to put forwarding in place on a user's mailbox which is now on our on-prem Exchange 2013 server (we have hybrid deployment). I need to deliver to mailbox and forward to another user's mailbox of which is in Office 365. (The user has left and we move mailboxes back to our on-prem Exchange when users leave).

I used to be able to do this when we had Exchange 2010 on prem via EMC, but don't seem to be able to do this via EAC on Exchange 2013. If I go to mailbox features on the mailbox I want to put the forwarding on, and then mail flow, and then browse to select the receipient - it doesn't show me recipients in Office 365.

Any help on how to correctly put forwarding on an on-prem mailbox to a mailbox in Office 365, would be much appreciated.

Thanks,

Chris