On Outlook 2010 it is possible to show messages from other folders in the conversation view (it's an option in the Conversation Settings menu on the ribbon).
Is there a similar option for Outlook for Mac 2011?
Macos – Show messages from other folders in conversation view on Outlook for Mac 2011
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Related Solutions
macos,microsoft-outlook-2011,office-for-mac – How to Create Custom Smart Folders in Outlook 2011 Mac
Use raw queries. For flagged or unread mails:
(com_microsoft_outlook_flagged = 1) || (com_microsoft_outlook_unread = 1)
Important note: Do not use this folder with the "mark as read immediately" option, as seen here:
This results in a continuous mark as read -- remove from view -- show next message -- mark as read cycle, until everything is marked as read and you have no idea what you've now missed. Instead, I've switched to the 2nd option displayed that marks as read when you select a different message.
The only way I've found is to right-click on the message in the message list and choose View Source in the popup menu. This will open the full source of the message, including headers, in a new TextEdit document.
Best Answer
According to this chart, it isn't possible in Outlook for Mac 2011.