Hi,
We have recently migrated users to linked mailbox on a new exchange 2013 server. We have discovered something strange with sharing calendars.
When we try to share availability with a mail security enabled group that contains linked mailbox, it is impossible to view the other calendar (on Owa or Outlook 2010 & 2013).
We can solve this issue by put directly the user (linked mailbox) and assign permissions to it.
Someone has ever seen this behaviour ?
If you have some others questions, don't hesitate !