We are looking for a way to encrypt Bookings calendar (so, the hidden "SchedulingMailbox" mailbox he belongs to, that appears to be a shared mailbox) at rest, using a customer owned key.
We have other mailboxes covered with an implementation and setup of Customer Key, that do requires E5 license.
Is there a way - and how - to encrypt Bookings as well, using the same approach?
We are evaluating to use a per service policy, so encrypting all Exchange Online, but are unsure if this will cover Bookings as well, or not.
