We recently migrated from in-house Exchange to Office 365.
At this firm, a lot of the assistants have Full Mailbox Access to their lawyer's mailboxes (sometimes they have access to two or three of them). We are experiencing performance issues when the assistants do things like: selecting multiple messages, deleting multiple messages, moving large emails...those kinds of things.
I am confused as to how cache mode works in this case. I would assume it would be best to have all of mailboxes an assistant has access to to be cached locally. However, when I look at the data file folder location, the only OST is for the assistant's mailbox. I would have thought to see an OST there for each shared mailbox.
How do I get it (if that is actually what I want) to get all the mailboxes they have access to to be cached locally?
Is there a problem with it auto-mapping?
Do I need to setup their profile, or their specific Exchange account, in a specific way?
Thanks for taking the time to read this question.
(PS: Please no suggestions of 'Get the lawyer to shrink their mailbox size'. It just ain't gonna happen.)