I have a VIP who needs to have all of his emails easily searchable in his outlook. He already has an E3 License. Mailbox is 100 GB and Archive is 130GB (after microsoft increase). Microsoft says they are not allowed to increase anymore than that. I do not want to enable the auto-expanding archive feature that 365 has as his search experience will change (he will have to search from multiple places.
My idea is to offload some of the archive email into a shared mailbox and then manually add that shared mailbox onto his outlook and he will then be able to search all mailboxs and archives from one search inbox.
What does everyone think about this idea? Does anyone have any other/better approaches to this?