My user at a non-profit company is using Outlook 2010 for a local mail client.  She is configured to monitor/open 2 additional mailboxes via the company's Outlook 365 account.  She needs to be able to conduct a search that spans the mailboxes - but apparently the results are only her default mailbox. In the Exchange Admin panel on Outlook 365 I have given her full permissions to the non-default mailboxes.  She is regularly pushed Msft updates for Windows 7 and Office. What am I mis

Searched in cache mode or online mode?

Does he click "all mailbox items" to expand the search to include the all mailbox folder? If not, please try it.

Tony Chen
TechNet Community Support