Office 2007 was notably lacking this feature, and since Office is mainly updated in big leaps rather than small patches, Outlook users had to wait until Office 2010 for it. But now you have it, and while the feature may be late, it makes up for that by being a particularly good rendition of the idea.
The conversation feature actually is not turned on by default, but can easily be activated by going to the View tab and clicking the checkbox next to Show as Conversations.
After enabling conversations, you have a few choices you can make, which are enabled using the Conversation Settings button. The only option selected by default is Show Messages From Other Folders, which simply lets conversations span multiple folders. The other choices are as follows.
- Show Senders Above the Subject: Simply flips the sender and subject lines so that the subject is now on the bottom.
- Always Expand Conversations: Automatically converts a conversation into expanded view, which shows all people involved in the conversation, when you click on it.
- Use Classic Indented View: Turns off the funky conversation graphs that are supposed to show you how different people and messages relate to each other, but sometimes fails to be clear.