in a hybrid deployment allow permission such as "Send As" and Receive As" and Send On Behalf of" to be allowed for shared mailboxes
When in a hybrid situation and you are testing migrating a pilot users if they have access to a shared mailbox, they lose the ability to "send as" if they are migrated to the cloud and the shared mailbox is left on premises. this can be very frustrating if your pilot test users also have shared mailboxes. they can still access them after migration because they have full access and that permission will migrate, but send as permissions do not migrate to the cloud. you have to migrate the shared mailbox but then non pilot test users will be affected if you do migrate the shared mailbox as they lose the ability to send as. all mailbox permissions should migrate when a user is migrated to the cloud
Hello, I have the same frustraiting problem regarding this issue. So I was wondering if there is any news enabling the "Send As" permission. Thanks in advance
Jonathan Khor commented
This is also a problem for our migration. There are some shared mailboxes in our organization which need to stay on-premise which is one of the reasons why our company took the approach of a hybrid exchange implementation. Users who are migrated to Exchange Online then lose their ability to send-as the on-premise mailbox which as the original idea poster mentioned is extremely frustrating for our users. Please come up with a solution other than "migrate the shared mailbox online".
This is preventing is from migrating all of our users to Office 365. We lots of shared mailboxes that users need to send from, and these mailboxes cannot be migrated to Office 365 due to compatibility issues.