View Mail Grouped by Conversation Thread in Outlook
Outlook collects messages in a conversation from multiple days and folders, then it displays them all together.
Include Your Sent Mail (and Other Folders) in Conversations
Set Outlook to group messages in the same folder and draw from other folders, including Sent Items.
How Does Conversation View Work?
Conversations show as an arrow to the left of the most recent message in the conversation. To see the other messages in the conversation, select the arrow to expand the thread. Select the arrow a second time to hide the thread. Unread messages appear in bold; any collapsed conversation with at least one unread message appears in bold, too. To streamline conversations in Outlook, have Outlook remove redundant, quoted messages; for irrelevant threads, you can also delete and mute Outlook threads.
Other Conversation View Settings
The Conversation Settings menu has a few more choices:
Show Senders Above the Subject: Outlook displays From: names first followed by the Subject lines in a thread. When this option is off, Subject lines are above sender names.Always Expand Selected Conversation: Outlook messages are expanded to display all the emails in a conversation when you open the conversation.Use Classic Indented View: Outlook displays threads in a list that has replies indented below the messages they answer. When this option is off, threads are shown as a flat list.
‘Show as Conversations’ Is Grayed Out. What Can I Do?
Outlook can group conversations by thread only when the emails in a folder are sorted by date. If the messages are arranged another way, Show as Conversations is grayed out and unavailable to check. To change the view to enable Conversations: