We are using some normal mailboxes on Exchange 2013 and set on them Full access permission for some users from federated domain. Thanks for this, these users are able to access these mailboxes from federated domain. But there is a problem with sending on behalf such federated mailbox. There is an error message displayed:
I have also tried to add send as and send on behalf permissions on these mailboxes but still users from federated domain are unable to send on behalf.
We have organization sharing enabled in Exchange 2013 on both domains (calendar free\busy). There is a two way AD trust between domains. We already synchronized global address books using Forefront Identity Manager
Anyone knows whether it is possible to send on behalf in such scenario?