Forum Discussion
Search in outlook using office 365
Searching in shared mailbox(es) depends on how the mailbox is added in Outlook (additional account vs additional mailbox) and whether the content is locally cached (with the "cache slider" also playing a role). Details are here:
Are you sure you are getting the sent items results from the shared mailbox, or is it your own? Do you happen to have the "keep a copy of sent messages for shared mailbox" option enabled?
To Vasil's point, be aware the cache slider only works on the primary Exchange account and not additional mailboxes in all versions of Outlook except 2016.
Also, whilst adding a shared mailbox as an additional Exchange account will allow you to control caching via the shared mailboxes own slider, you'll will likely have to roll back when your users tell you they want to receive notifications for their own mailboxes and not the shared mailboxes!